I just installed a new door regulator and motor in my '99 Honda Accord, when I plug the motor in it has electricity and moves up and down. However, there is a plastic obstruction in the way of me putting the window back in and dropping it down and bolting it to the regulator. Do I need to grease it or file down the piece of plastic? Those are just a few of my thoughts but if And knows what to do please let me know!