I got a strange problem with my radio. Radio is a Cobra 29 WX NW BT installed in a 2008 Freightliner using the OEM cables and mirror mounts, K40 Plus dual antennas. My problem is they cal. fine and SWR is fine, antennas are tunable, but for some reason I get a red ANT warning light when I key the mic for channels above 5, 5 and below no warning light. I have checked the ground seems to be fine, the radio works fine, just annoying to get the red light every time I key the radio. Anybody have any ideas what is going on here.