gomer pyle

my wifes 2010 edge has started having problems with the backup sensors. sometimes they work and sometimes they don't. i have noticed that they come and go as the driver seat is adjusted(?????). also, the driver seat sometimes messes up. i have tried to move all the wires under the seat around but can't seem to find any certain one that causes this problem. it states to "check back up alarm" in the dash. this is very annoying. anyone have any ideas? thanks for any help daniel