My office location recently moved to a brand new building with tinted glass windows. There is nothing blocking the window view (no surrounding buidlings, really open area). I have the antenna for the SirusXM Portable Speaker Dock directly pointed to the windows (my desk is about 45ft from the actual window) without any obstructions. I am unable to get a signal at my desk location. I'm even having issues getting a signal when I place the antenna directly on the window ledge. I talked to Sirus Customer Support and they said the issue is with the tinted glass. Does anyone have any ideas on how I can get a signal in my new location? Is there a "stronger" antenna I can purchase? A booster? I hate to waste the money on the dock if I can't use it at my office.

Thanks
Jody