After checking all the settings suggested by the group and concluding that my expensive little Yaesu box was toasted, I set the SatPC32 SDX to 2400 baud and turned off the FIFO buffer on my com port. VOILA! I'm guessing the data was getting corrupted in the data buffer but have no idea why that would be the case.

Thanks to all who replied with suggestions. Perhaps this fix will be googled from the archives in the future by someone having trouble passing data to the rotor controller.

Now at least the FM birds will be hands free !!

thanks and 73 KC8ZFN John Meeks