I am having some issues with my Clarion XMD3 Sirius Tuner reception. I want to get this activated but have been told you should be able to hear advertising on Channel 184 even if there is no subscription. When I go to Ch 184, the Display on the Radio just Scrolls- “INVALID CHANNEL”- “LINKING”- “CALL 1888539SIRI” but no audio. I am assuming since I am seeing information displayed the tuner is OK but maybe something is wrong with the antenna? Kind of a surprise though because when I am somewhere with no signal on my XM Radio, the radio displays “NO SIGNAL” which is not the case here. Any ideas on what the problem might be before I start replacing parts? I saw some other posts on Sirius but not with this exact type of issue. Thanks