Hi, Marvin Johnson. Looks like you probably did everything right. So, what is left is being patient and waiting for the update (if properly formatted) to be approved and subsequently go live on the site. If there is anything wrong, a member of the IMDb staff will inform you at some point. Please bear in mind the "(uncredited)" attribute is applied for cast/crew members whose names do not appear in the on-screen credits of the original release of a movie, so it is possible that some kind of "(version)" attribute would be more suitable, if variation of the on-screen credits across releases of the same movie is the case at hand.
This episode just aired on Wednesday. Usually, I'm the one that corrects/adds credits for this show. I didn't get to watch the episode on Wednesday, like I normally do but I'll get to it tomorrow. If it hasn't updated by then, I'll submit my own updates which generally go through quickly.