Ok the problem as on my end but i have a new one. The sobinstrator says when i try to open it this application failed to start because MFC71.DLL was not found. Re-installing the application may fix this problem. Obviously that didn't help. Anyone know what i need to do?
Run Windows update so your machine can download the .net update and upgrade from MFC70.dll to MFC71.DLL

Cheers,

Lee