Sony Ericsson P910i - Address Book, SMS and Dialing Problems

I'm having problems with my P910i. Everything is paired up in Bluetooth and it is syncing fine but it wont dial or send sms. I thought tiger would solve this issue but it hasn't. There is definately communication between my G4 powerbook and the phone as when i have an incoming call it comes up on the screen of my computer!

Is anyone else experiencing this problem? Is there a way to solve it? It is such a shame as it would be such a good feature to be able to use!

Cheers