Hmm WTH is going on

[Neubauer21]

Ok so last nighrt i was plkaying a net game with my mate and it crahsed about 1 hour through so i thought hey lets load it, samre thing happened again just crashed straight away ,hey i thought again i'll wait and play single player tomorrow but no guess what happened it crashed about 1 hour through i have a nvidia geforce 6200 128mb agp p4 30.ghz HT 750mb ddr ram, If anyone has encxountered this problem before and solved it please get back to me i am so in love with this game (ain't played since Civ2