I have the same problem, with my Clicksmart 310. I think the drivers may be shagged (qc601enu)
I had it working for ages untill a couple of days ago, when it just locks up when I use netmeeting, then wont let me shutdown, saying that "LVcomS.exe" cannot close, causing me to have to reset mi computer........
I would try instaling, the drivers you have on the CD, I would install them if i could find the cd.....
anyone else have any ideas???