AE-1 Program Motor Drive Issue.

[Ektagraphic]

Hello-
I have here two AE-1 Program cameras and a motor drive. On one of the cameras the motor drive works just fine but on the other camera the motor drive continually tries to advance the film at random times and ends up making a squeeling noise just a flash trying to charge up. Is this an internal computer issue? The motor drive I believe is a Kalimar C-1.....

Thanks!

Patrick