I remember having this issue and reading about it for another device eons ago. This is almost certainly an issue between Windows XP and your USB controller as I've never experienced the problem since.
I can't find a better link (again vauge memory from way back) but these should help:
http://social.technet.microsoft.com/...-6b39e36cd717/
or
http://social.technet.microsoft.com/...-b833895455d3/
Short answer, if you are still using XP its time to upgrade.