Transverter help

Hope someone can help.   Im attempting to use a Q5 Signal 144 MHz XVTR with my Flex 6400. Ive connected thee two units together according to instructions.  Ive set up the XVTR on the Flex, and Ive configured a memory to access a nearby repeater.  So far so good.  When I key the mic, I get tones back from the repeater. I can hear QSO's on the repeater.  The XVTR bargraph shows power output. My inline Power/SWR meter shows low SWR and proper power output to the antenna.   No one can hear me!!   I have to have a setting goofed up somewhere. Any ideas for a newbie?  Im attaching a screen shot of my SDR screen.  As a side issue, if I simply substitute a different  rig in place of the flex it works fine. Any help greatly appreciated.
Jim KC3KRZ