Correct APN settings but data will not work

[GoonerBeatYa]

Hi all I seem to have a problem I have rooted and unlocked my bootloader and flased with rom Carbon 4.3.1on my HTC HD Desire Phone. Everything runs fine except the data don't seem to work even though the correct settings has been applied. Whats so weird it comes on for like an hour then don't come back on again. I have had the rom installed for like 3 days now and it has come 4 times. I have tried switching off the phone, trying different settings also my mum and bro have the same network and same apn settings in my phone is in theres. The apn settings work fine in the stock rom.

Any help much appreciated.

Edit - Also I will like to add that the data flickers on and off. The H sign next to the bars

 

[Tampa8]

At&T? If so good luck ever getting it to work again on that network from everything I have read. Their version was not able to be unlocked, (Boatloader, not talking about unlocking sim usage) and an unlocked one may not work.

 

[GoonerBeatYa]

Its a virgin media sim uk.