seti command line client 3.08 crashes

Hi!
I'm new to this Newsgroup, but I have a very interesting problem.

On my machine (Win2k SP4) the combination of seti command line client
3.08, seti driver and seti spy ran without any problem for about 100
WU's. So did the same combination of two other Win2k SP3 machines, but i
didn't run these client very often.

Then, one day about one week ago, when i started the seti spy, the
client crashed. i tried any combination of restarting. deleting the
*.sah files, reinstalling seti driver and seti spy, running the client
barely without one of the helper applications. it crashed again and
again. sometimes it happened, that the client finished a WU. but in most
cases, it crashed.

then i checked on on of the other machines: the same story.

i left the problem as is, and when i reinstalled my machine (now with
WinXP), i tried to run seti. it finished one WU and the story goes on.....

Can anybody imagine what happened and how i can fix it!?!?

greetings