[toro as]

I have my blackberry data plan activated before i went overseas. In order to use bbm while im traveling. At first, it works fine. I can connect my bbm through wifi. Until lately, i had my sim card( with data plan) changed and after i changed the sim card back it wont work anymore. Even though it connected to wifi. Just bbm that didnt work. Else, browser and appworld or whatsapp, still work fine. Any solution for my problem?? :'(