Iphone not activated after 3.0 update
hey guys I'm new here so this is my first post.
i have a jailbrocked iphone, (i dont know how it was jailbrocken, but it had cydia and installer, in the phone when i bought it, and i don't know whick software i had previously) and after updating it to the 3.0 software, itunes says "there is a problem with your iphone, we are sorry but we cannot recorgnize the iphone you have connected and the service cannot be activated. we recomend to visit the closest apple store to obtain more information". and on my iphone screen it says slide for emergency and in the background the picture with the usb cable to connect to itunes. i'm kinda scared because i couldn't find any other posts describing this problem or how to solve it.
i've read about the unknown problem (-4) but i tried their solution but didnt work.
please reply, because i love my phone and now it is literaly dead.
PS. sorry for my english