AFAIK the usb connection will not work. in order to work you need a com-port (a real or at least a virtual one). Newer Nokia USB-stuff works directly through usb and does not create a virtual com-port, so there is no way to connect this to phoco via usb. Why not buy a BT-Stick?
I have that phone and it works fine through BT. not sure how you can hear someone, but they can't hear you. Sounds like a audio problem, not phone or BT.
Progress - VIA EPIA SP8000 | 120 Opus Power Supply & Case | 1GB Ram | 120GB 2.5" Hard Drive | Bluetooth 2.0 | GPRS/3G | Wifi | Road Runner/LSX 2.0 (waiting for a day skin for 3.0) | iGuidance 4.0 | Lilliput 7"