There are several things you can do with BlueTooth, including file transfer.
It may be your phone just doesn't support file transfer.
It doesn't mean the adapter or phone is faulty.
Try reinstalling the software and drivers and see if that helps, beyond that I'd say your phone just doesn't support it.
Athough it really should, my friend has a V3 and his does . . .
Have you tried anything other than File Transfer?