You didn't say so I'll ask - does that radio switch into the transmit mode (is the PTT working)?
If so I might suggest checking to see if you have some narrow values in the high and low cuts in the microphone panel. I had this bite me a time or two while experimenting. Open the cuts up (like from 50 to 3000 Hz). While trying to get things set up for RTTY I had this happen and it took me a few minutes to figure out I had the cuts set to one place and the tones were somewhere else. Everything looked like it was working but there was no RF output.
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