TT700 and Bluetooth internet connection

[prelude4ws]

Hi

I have a TT700 and a sony ericsson k600i phone on orange, both connect to each other fine via bluetooth,
except when the tt needs to access the Internet, e.g. for traffic downloads. after much switching on and off
of both units it can normally be persuaded to work, but may only last half a journey or if you stop for petrol
it wont work again. anyone else come across this? its a real pain as when it does work its a really good
system!