Help with Comand online and HTC One

[workingsound]

Hi I've just purchased a C Class estate 2012 with command and I'm having a nightmare connecting to the internet in the car using my HTC phone for the data connection. The phone connects fine to the bluetooth for calls and streaming music but not for internet use and it would be great to get this working. I have been reading up on various forums and as a result downloaded PdaNet+, FoxFi Key, and BlueDUN and followed the instructions, all with no success. It may well be me missing a trick but please if anyone can help let me know. Many thanks