I recently converted back to auto from manual, because I'm gay and prefer the auto trans........... But
After refitting and bleeding the auto trans fluid, the car would move under its own power for a few feet, and then stop. When rechecking the fluid level, it took about another litre to fully top it up, and it's been perfect ever since.
Also, I had an issue with the trac light blinking, and no manu mode. Opon checking my ecu, I found it was leaking brown fluid from one of the plugs. I've since fitted a replacement ecu, and it's been perfect ever since.
This might not help you, but I'd recommend checking both the ecu and fluid levels