Found the solution:
Open the registry editor (regedit)
Navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management
Add a new REG_DWORD entry called SessionImageSize with a value (decimal) of 20
Reference...
Well it took me some time to guess what "collab" was but now I know. http://collab.mathsoft.com/~Mathcad2000
The solutions are though too difficult to mee to perfectly understand so hopefully my Helpdesk can do the trick.
Thanks for the ref.
Well that seems to be the problem. One of the computers is missing the unimath font. How can that be fixed? Can it be by by copying a file from one PC to the other?