I took mine to a friends once, and it took me a bit to re-sync. I think you have to get the controller blinking before you hit the sync button on your 360. It had to be a specific order.
Also, I would check that the button is really pressing on your 360. Sometimes dust or something can block the connection.
Sorry, I wish I could be more helpful. I would try having a friend connect one of theirs to make sure it's syncing properly.







