hello Caboose and thanks for posting.
it's strange that the device should stop working in this way, especially since it was previously operational.
You can take it to any of our stores to have it looked at and possibly sent off for a repair, my advise is to go ahead and approach the store and then keep us posted via the eForum as to your progress. If you are still experiencing difficulties then we will see how best to help.
I would also advise testing it on a windows machine, just to make sure the dongle itself is 100% functional otherwise a repair/replacement may not make a difference.
Thanks
Reidar
eForum Team