FT8 issue

6600M working fine, with external Maestro...until upgraded 3.18 last week.  Now I can't get the FT8 to read....continues to say Driver Error (DAX).  Testing on WSJT...green and red lights ok but cannot read.  Previously I could read when using Maestro or 6600M, switching between the two.  Now neither seems to read FT8.  It seems to xmit ok.  Yes, reloaded DAX and CAT software X 3...nope.  Also went back to old software, still a problem.  Works ok on CW and independent Maestro seems to work ok.  However some difficulty with phone....can't get the mic select (2) to hold....but that's probably a different issue.  Nothing else new.  Also cannot read FT8 on the PC...though can see signals, tune, etc....I'm sure it's something simple.  Otherwise, 6600M has been smooth as silk, way better than the 6500 was.  Thanks to all.  73 es Aloha, Bill, AH6FC