A.V.A Random crash ! Help

When im playing ava, in the middle of a round ava crashes and i get an error msg saying something at end like: last file: etc.upk and ram etc/4000mb i think ... Ive searched this error aldready and i saw a thread i nava forums saying i needed to download the upk file because it was corrupted..i did it but the error cmeback and this time it was a different file. i even reinstalled ava.. i read some threads here about some service xhunte ri dont know if its connected but i got really confused and i dont know what to do since i didnt understand a dine. all i know is that i cant play ava and i QQ






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