I have an exe (Visual Stdio 2008 C# app) which runs fine on my development machine but when I load it up to a Windows Server 2008 it comes up with a ..exe has stopped working message and a whole pile of 'Pronlem Signature' errors and a Problem Event message(CLR20r3)

This is something I have not seen before.
Anybody got any ideas of what this might be ?
Tia
Gerard