Is everything plugged in securely. Also check that the encoder wheels are not skimming over the tracks instead of rolling on them. Your frame may not be as level as before and any bump or dip in the track will cause trouble.
will double check tomorrow, in bed with nyquil on board right now. we know it is level, he has checked that. thought i had it all plugged in good but that is great suggestion. hope it is but will double check. ty