Power Seat Won't Go Back

I have a 2007 Mustang (v6). I put in leather buckets from a 2006 GT.

I had moved the seat as far forward as she could go so I could work
on something from the back.

Went to move it back, it would go about half way, then stop. Everything
else works...just seems to stop at the same point.

I figured, no problem, just order another switch. Got the switch, installed
it...the seat still won't go back. Makes it kind of hard to drive with my
nose on the dash

Any ideas? I'm mechanically stupid, but I assume its not the motor since
it can go forward, up/down, etc...maybe a specific wire...something
blocking it?

Thanks
Doug

Got it working. I moved the seat all the way forward and first check for any obvious
obstruction (none). Tried a little wd-40 and now its working again.

Doug