I don't know about your vehicle or your particular install issue, but I do know that if it says "System off" it sounds like your cell phone isn't properly paired with the system. If you know the phone IS paired properly, then you have another problem. But if it doesn't indicate "Telephone," I'd guess it isn't seeing your phone.
I'd recommend trying the pairing process again, and make sure you enter the four-digit bluetooth code for your ULF on your phone, at the place where it asks for a password for the discovered BMW bluetooth connection.
nce yo're properly paired, it may/should work. Or at minimum, will show you your phone name or whatever at the "Telephone" prompt. I think.
Good luck!
Dave