Has it worked in the past and have you tried to verify that the setting is active on the scanner itself? You can do this by hitting PGM > FUNC > F3 (GLOB) and scrolling to the bottom until you see 'Show RadioID: Yes/No'.
If it's on, does it only sometimes show the RadioID, or never? If you only occasionally get RadioIDs, then it could be caused by a number of things. You mentioned that you have a few conventional frequencies in your scanner. If you scan those simultaneously, it will stop tracking the TRS for a couple of seconds to check those frequencies out before returning to the TRS. The Pro-106 only picks up RadioIDs from the control channel at the very beginning of a transmission so if it cuts in halfway, then it won't display a RadioID.
If it never gets a RadioID, then I don't know what would be causing that.
Last edited by Spitfire8520; 02-26-2013 at 12:33 PM..