hmm.. that's not good. We haven't had anyone report that in a long time. I suppose it may help if you send us your log files. You can get info on that here:
http://www.tubetoolbox.com/logfiles.aspxAlso, I guess it would be good to know if you're running Windows XP, Windows Vista (32bit or 64bit).
Thanks for your order. Hopefully we can get this figured out and fixed quickly.