I can see that your roaming is activated on your subscription but would you be able to describe what is occurring on your phone for me? Is your phone connecting to a network in the country you're in but you're not able to use data or is your phone unable at all to connect to a network?
In either case, have you tried connecting to a network manually? Also try locking your phone to 3G only. Would you also be able to tell me what country you are in so I can take a deeper look?