Empty buttons en message boxes

We are building a VB .NET application. We are running it on 6 Windows 2003 STD Terminalservers. 150 users are going to use it.
When we starting the application, some buttons are emtpy, no text. The messageboxes that appear when some field are not filled are also totaly blank.

VB .NET quied new for me.

On some Terminal servers is the problem not pressent, .Net FrameWork 1.1 SP1 is installed.
The Terminal server configurations are indentical.
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post your code
hvdhelmAuthor Commented:
I have found the problem!

Quote form McAfee's Prime Support Center:

Patch 9 for McAfee VirusScan Enterprise 8.0i solves:

- List boxes and Message boxes in .NET applications do not display any content
- Toolbar icons in some applications display as black boxes.
- Web Inspector crashes

The McAfee VirusScan Enterprise 8.0i Buffer Onderrun Protection was the problem.
Closed, 400 points refunded.

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