installed the xm radio from toyota that is suppose to work from the solaris...i say suppose to work....wondering if the unit is defective????....we are unable to change the channels from the steering wheel effectively....this is how it works....say you are on any channel from like 4 to 200 and you select the up or down key on the steering wheel....it will the change the channel, (4 to 200), to channel 1 and that is it.....no other up or down steering wheel key will move to another channel from then on...... stuck on channel 1 forever!!! what's up?? 