Random Crashes and Disconnections?

[Delusional]

Well i recently started playing again (weee i love it) and everytime i join i server after about 30 mins i either crash...or disconnect...I have no clue whats going on but it's pretty annoying (resetting score/PL or even full server i was just in)

*EDIT**

All my drivers are updates
No error message
esf 1.2.3

Sys Specs:
GeForce 4 MX440
1 Gig of ram