My XM radio is mounted to the left handlebar. It worked great for about a year. Now I'm loosing reception. I can't tell if its the radio or the mount causing the problem When I hold it together just right it keeps playing. After a couple bumps in the road it fails again. Everything works fine in the car or in the boom box. Of course, there is less vibration than the bike. Has anyone had this problem? How do I fix it?