Blackberry 8900 Wifi Not Working after installing bbm&email data plan

Hey,

So I recently bought a Rogers Blackberry 8900 off of kijiji. I unlocked it and put my Fido sim card in. Everything worked fine even the wifi. So i decided to get a data plan for 15$ (inc. bbm & email). BBM and email work. Once the data plan was installed, my wifi stopped working (at home, friends house, even school). I tried some of the methods posted in the forums, but it doesnt seem to work, even though it says i'm connected to my home internet connection. How do I get the wifi to work? Any help will be greatly appreciated.