Ok,the frequencies need to stay on MO.try programming in the frequency table by hand.heres how to do it: press PGM>TRUNK>FUNC>3 should say 3600 CC Mode this needs to be set to table. press enter,next press FUNC then 2 and it will say base freq offset and step. put in 505.00000 for the base frequency and then set the offset to 380 and finally set the step to 12.5
This may sound strange, but on my pro2096, I had to program all the frequencies starting on the 5th channel in the bank (channel 405 for example) for it to trunk properly. Don't ask, all I know is that it didn't work before and now it does.
Did you program the 400 MHz frequencies as part of the trunk system? If so, get rid of them. They're not part of the trunk system. They are conventional frequencies that will eventually be used as a back up to the trunk systerm. The trunk system periodically experiences severe interference from what I believe is a digital television station somewhere and when the 400 MHz frequency conventional system is up and running it will be used when this interference occurs. If you want to program them, program them in a separate bank as conventional (non trunked).