First thing i would do is check the physical connection both ends for your DMX line 2
Next check that its not a faulty cable by putting your DMX line 1 into DMX port 2 on the desk and see if anything happens to the fixtures on Universe 1 in the rig if 2 is sending the rig will respond and you know its the cable that has a fault
Next go to your connect universes tab in patch and double check the DMX output is assigned correctly
if none of the above works contact support