2004 Sienna XLE Power Back Door problem

The power back door on my 2004 Sienna XLE is not working right. Right
after it fully opens, it starts to close by itself. The first time it
happened, it almost pinned my daughter down while she was grabbing some
groceries in the back. Good thing I was able to push the switch from
the driver's seat right away. The door stopped closing and reopened
again, but as soon as it reached the top, the door beeped and started
closing again. So now, the power back door would not stay open. For
the meantime, I have to turn off the power back door, and open it
manually.

Does any one there have this same problem, and know the fix for it?

A 2004? Why haven't you already been to a dealer?

Buck Frobisher wrote:[color=blue]
> A 2004? Why haven't you already been to a dealer?[/color]

Aside from the middle seat belt recall item, is there any other reason
I should know about?