Sarah,
Had a similar problem with the same machine. You may have already tried this, but switch off or unplug all power to the washer and leave it unplugged for a few minutes.
Despite the fact that there is no logical reason why this should work, it did for mine. Although it may have been something to do with all the sliding in and out to get to the plug that sorted it rather than cutting the power !!
JJ
February 2013