i can't connect to get online, it did this when i did some money glitch and when i reconnected i was level 1, 0 cash. I hope its my connection not R*
EDIT:
im banned :(
i had a problem kinda like this and i just shut down the xbox and the unpluged the power cable left it for 5 min and came back, pluged it in and turned it on and it was working again. It might not work for you but try it.
If that don't work try @durham as hogan method "go in to settings, attach...