Ubuntu and Mobile 3G help!

[Desmo]

I'm trying to get the lappy connected via 3G from my mobile. I've installed Blueman 1.9 (had to use an older version as the newer one wouldn't install) and also installed kppp.

Now, I can get my mobile to connect to the laptop, "dial up" and it completes the connection. The mobile shows the 3G symbol and I seem to get an IP address. But that's it, no data flows in either direction apart from the first few packets of data which I'm assuming is just the connection data.

So, I'm at a loss as to what to check next. It seems it should be working but just doesn't. Using a Nokia N73 on O2.