it wont be that as i had that same version on my o2 uk device with same csc installed and when i set up the apns they worked correctly
make sure you have 2 apns.
o2 wap which is internet and mms and has the mmsc info etc there
and then mobile web which is internet only
for information on this you can use
O2 WAP Setting MMS Settings GPRS Settings O 2