Have your tried ndiswrapper?
I'm using the same USB wireless adapter you have with Breezy and it works well. Are you using current version of Kubuntu, based on Breezy? It was a bit of a pain to compile under Breezy (5.1), because there is no gcc-3.4 on the cd. I had to download and dpkg -i 3 files, start
here for downloading gcc-3.4 and it's dependencies. gcc-3.4 and 4.0 can coexist peacefully.
Dennis