Perhaps I can help you.
I have connected 7650 with pc on Bluetooth running win XP.
The secret is to use the "compatibility tool" offered by XP, selecting all the programs of nokia, (one by one) and forcing compatibility with win 2000.
you know, right button mouse-propierties-compatibility,...
By this way, now I can syncronyse my 7650 with outlook counts on desktop, using an USB BT (see http://www.msi.com.tw/program/products/per/per/pro_per_detail.php?UID=326&MODEL=MS-6967)
Say me if this help has resolved your problem.