COF Mutiplayer exit problems

Hi all! Well after a lot of tweeking since I have COF, end of july, I have got my no cutting edge system (Athlon 1.33 Mh, 512 MB pc 133, FX5200 on XP Pro., 40 +13 mg HDs partitionned and FAT formated, NVidia 45.23) running correctly. I'm now quite happy with what I've got given the system I have.I'm still left with an annoying glitch and hope I will find some ideas for a solution here.When I go multiplayer (phone modem) things are ok until I want to disconnect. At this point a windows comes on and ask if a realy want to terminate the connection (or something like that!). Pressing Yes button, COF will freeze there. I have to shut COF off (ctrl-alt-del - terminate or anything alike) to fall back to Windows.If I stay connected and start COF back, I won't accept to relog to Multiplayer. To be able to do so, I have to shut COF and the phone connection off (and sometimes, even have to shut system off), re-dial and then restart COF. On the other hand (still remaining connected) if I go to the Internet, the system will operate for 5-10 minutes then crash with an automatic restart with the blue screen of verification of file integrity of the HD.I do not have these problems if when I use FS2k2 which is still operational and running real fine with most of the sliders maxxed, in an other partition of the HD.Any ideas?Hugo