Can anybody please help!

I went to restart a network game tonight having not played it for around a week. After to the matchday screen to select my squad, the game crashed (kicked me off) and presented me with the following message:

A serious error was encountered and the application will close. An error file has been generated in: GARETH-PC/C:/Users/Gareth/Documents/Sports Interactive/Football Manager 2009/ crash dumps

Does anybody know why this has happened and what to do to fix it. I had problems this morning with my internet connection and the women from BT had me turning my Hub on and off several times. Once the internet was back on my computer was running very slow, so I did a full system scan in safe mode (found nothing) then restarted in normal mode then everything appeared to be working fine, until this latest problem.

All help much appreciated,

Cheers.