Server reboot (crash) after copy / paste with remote desktop

Hello,

I’ve got a question about copy / paste with a remote desktop connection.

Our server (Windows 2003) crashes with a remote desktop copy / paste action.

I copy a file, in this case from my own computer. I want to paste that file to the server. Result: Direct reboot from the server.
After the reboot I can’t see anything in the log accept something like “the server shutdown unexpectedly” .

This wasn’t a problem before.

Who know’s a solution?

Thx!