First of all, the bluesolleil drivers dont have the AUDIO GATEWAY function.
That is the function that makes it work.
If you dont have audio gateway, it doesnt work. Get the WIDDCOM drivers.
I have a 6280 myself but when I use audio gateway, I only get a lot of noise so I use my old 6230i again. That phone doesnt have a problem
Still.. you need the audio gateway function