are you sure the voltage and amps of the power supply feeding the flexmod are appropriate? (not too low?)
are you sure that the v to ui is soldered correctly?
then are you sure that it is the v and m sorted together and not something else?
have you unsorted the laser diode output?
sorry for asking simple questions but it is something simple you are missing now and i'm too sleepy rite now to think of anything else...
hope it all works out for you or someone in your own timezone catches up to this thread
"its called character briggs..."