After parking the bike for about 60 days the XM antenna does not work. I get "Upgrade XM Antenna" when I select XM radio. Same thing happens on the auto mount. Worked fine when I parked it. Have used the 665 in the car during the layoff without using the GXM-40 antenna. Garmin is offering me a free replacement but logically this doesn't make sense and I don't want to wait for the new unit. I've checked all the wiring and everything is as it was when I parked the bike. Anybody got a fix?