I replaced the door boot seal on this unit. Now when the washer starts the agitation cycle it starts to shake like it has an unbalanced load on the spin cycle. The unit shuts itself off. I tried taking all the clothes out and running the cycle again. It doesn't seem to shake but it shuts itself off anyway. The first time I ran it, I didn't stay around to watch it but when I came down there was water all over the floor. When I ran it again, the tub filled with water and ran for a little while without leaking, so I think it probably leaked through the door during that shaking period. Anybody have an idea what the problem might be?