Hi
Try closing the video clip (real Player) and re-opening it again. If the same problem persist. Try switching the server. If you are using US..use EU...vice versa.
Also, the site seems to be slow at the moment. (might be heavy traffic) I'm currently watching Euerka, although, the episodes are loading they are taking a little more time to do so.
any more troubles don't hesistate to ask for help