Clyde

Memory Seat doesn't remember fore & aft position
Help Please!
I have tried moving the seat all the way back then all the way forward in an attempt to re-learn position but it didn't work. No faults in the Memory Seat module. I tried clearing and re-learning the position. The tilt, seat back & mirrors work fine but no fore & aft movement from the seat bottom. It seems to work fine using easy entry but if I move it out of position then try to re-call the seat using the memory button, everything seems to go into position except the fore & aft position.
Is there a step by step procedure for re-learning or re-initializing this thing?
Any tests or suggestions are appreciated.