I flashed an EGCN191 firmware on my UVK6. When I'm using it, if someone else is CQing, the K6's signal light turns on, and the microphone indicator also lights up, but there's no sound. I have to press the monitor button continuously to hear anything. If someone directly DTMFs me with their ID, only the signal light turns on, and the microphone indicator doesn't light up at all. Please help!