i have a blackberry curve 8520 and i tried setting up my wifi conection and it siad it was succesfullly conected but when i set up my connections and i connect to my wifi, it says its on but it have a white minus symbol next to it. how can i fix this? and how do i know if my BB is using my wifi connection or using the internet from my phone provider? because i have no data plan and if i use there internet they will charge me. i just want to use my internet from home.