NetworkManager and Vodafone Mobile Connect

[Sam Przyswa]

Hi,

On Ubuntu 9.04 I have problems with NetworkManager and Vodafone Mobile 
Connect (Internet via mobilephone) when it connect to internat via ppp 
interface Firefox doesn't see the opened connection. Firefox only see 
the connections opened with NetworkManager, NM is very unstable and 
buggy, on my desktop I had to remove it and configure by hands the 
/etc/network/interface.

How to fix the problem and make Firefox working with VMC ?

Sam.