Repeated+seemingly random MP crashes

[TheSHadowOfLenin]

I have had this problem for a fairly long time on JAMP, but recently it has become a whole lot more frequent and unpredictable. Basically it is just the problem of MP crashing at random, in the past I only got this on specific servers (meaning that I could go to some that would hardly ever crash) and the crashing would usually occur as soon a I connected. However I now have the problem of this happening all the time, sometimes it crashes as soon as I join a server, sometimes it lets me play for a little bit before it crashes, other times I can go for a couple of hours without any interruption. But it the the way this is so unpredictable that I find really annoying. I have several JA mods installed, and have reinstalled the game about six times to try and correct the problem.
So if anyone has had/knows how to correct this horribly annoying situation then please enlighten me.

[TheSHadowOfLenin]

*bump*
This really is driving me insane. I can hardly connect to any server now without the game crashing as soon as I enter the game.