Microsoft states in their article: 899266

Error message when you try to paste data into Excel 2003 during a Terminal Services session: “Cannot empty the clipboard”
View products that this article applies to.
Article ID : 899266
Last Review : May 4, 2006
Revision : 1.0
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SYMPTOMS SYMPTOMS
CAUSE CAUSE
RESOLUTION RESOLUTION
Windows Server 2003 Windows Server 2003
Hotfix information Hotfix information
Windows XP Windows XP
Hotfix information Hotfix information
Prerequisites Prerequisites
Restart requirement Restart requirement
Hotfix replacement information Hotfix replacement information
File information File information
STATUS STATUS
MORE INFORMATION MORE INFORMATION
Technical support for x64-based versions of Microsoft Windows Technical support for x64-based versions of Microsoft Windows
APPLIES TO APPLIES TO
SYMPTOMS
When you try to paste data into Microsoft Office Excel 2003 during a Terminal Services session on a Microsoft Windows Server 2003-based or Microsoft Windows XP-based computer, you receive the following error message:
Cannot empty the clipboard.
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CAUSE
This problem may occur if the computer that you use to connect to Terminal Services has multiple processors and if you use Remote Desktop Connection (Mstsc.exe) in the same Terminal Services session that you use Excel 2003.

Note If you stop using Mstsc.exe in the Terminal Service session, you can paste data into Excel 2003 without receiving the error message that is mentioned in the "Symptoms" section.
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RESOLUTION
Windows Server 2003
Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows Server 2003 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
Prerequisites
To apply this hotfix, you must have Windows Server 2003 Service Pack 1 (SP1) installed on the computer.
Restart requirement
You must restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time item in Control Panel.

Windows Server 2003, Enterprise x64 Edition
File name File version File size Date Time Platform SP requirement Service branch
Mstscax.dll 5.2.3790.2556 1,078,272 27-Oct-2005 01:25 x64 SP1 SP1QFE
Wmstscax.dll 5.2.3790.2556 753,664 27-Oct-2005 01:25 x86 SP1 WOW

Windows Server 2003, 32-bit x86-based versions
File name File version File size Date Time Platform SP requirement Service branch
Mstscax.dll 5.2.3790.432 681,472 26-Oct-2005 19:52 x86 None RTMQFE
Mstscax.dll 5.2.3790.2556 753,664 26-Oct-2005 19:45 x86 SP1 SP1QFE
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Windows XP
Hotfix information
A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Windows XP service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:
http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)
Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.
Prerequisites
To apply this hotfix, you must have Windows XP Service Pack 2 (SP2) installed on the computer.
Restart requirement
You must restart the computer after you apply this hotfix.
Hotfix replacement information
This hotfix does not replace any other hotfixes.
File information
The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
File name File version File size Date Time Platform SP requirement Service branch
Mstscax.dll 5.1.2600.2699 655,360 16-Jun-2005 15:20 x86 SP2 SP2QFE
Rdpclip.exe 5.1.2600.2699 62,464 16-Jun-2005 02:51 x86 SP2 SP2QFE
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STATUS
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
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MORE INFORMATION
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
824684 (http://support.microsoft.com/kb/824684/) Description of the standard terminology that is used to describe Microsoft software updates
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Technical support for x64-based versions of Microsoft Windows
Your hardware manufacturer provides technical support and assistance for x64-based versions of Windows. Your hardware manufacturer provides support because an x64-based version of Windows was included with
your hardware. Your hardware manufacturer might have customized the installation of Windows with unique components. Unique components might include specific device drivers or might include optional settings to maximize the performance of the hardware. Microsoft will provide reasonable-effort assistance if you need technical help with your x64-based version of Windows. However, you might have to contact your manufacturer directly. Your manufacturer is best qualified to support the software that your manufacturer installed on the hardware.

For product information about Microsoft Windows XP Professional x64 Edition, visit the following Microsoft Web site:
http://www.microsoft.com/windowsxp/64bit/default.mspx (http://www.microsoft.com/windowsxp/64bit/default.mspx)
For product information about x64-based versions of Microsoft Windows Server 2003, visit the following Microsoft Web site:
http://www.microsoft.com/windowsserver2003/64bit/x64/default.mspx (http://www.microsoft.com/windowsserver2003/64bit/x64/default.mspx)
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APPLIES TO
• Microsoft Windows Server 2003, Enterprise x64 Edition
• Microsoft Windows Server 2003, Standard Edition (32-bit x86)
• Microsoft Windows Server 2003, Enterprise Edition (32-bit x86)
• Microsoft Windows Server 2003, Web Edition
• Microsoft Windows XP Professional
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Keywords:
kbwinxppresp3fix kbexpertiseinter kbwinserv2003presp2fix kbbug kbfix kbqfe kbmsccsearch kbpubtypekc KB899266
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