IMDb references...

Not that this is a huge deal, but I was just wondering if someone knows why this isn't working...
This movie is referenced in the Smallville episode "Slumber" from Season 3. Lex Luthor has a prop sword from it hanging on his wall. I tried to add this tidbit to this movie's "Referenced In" page, but it kept getting rejected. I tried several different things, like putting just the series name, just the episode name, the series and episode name, but nothing worked. I kept being told that either I needed to put the episode name in, or that the name of the series/episode wasn't in the database. I checked, and it totally is. Anyone know what I might be doing wrong?
PS Sorry if this is posted on the incorrect type of thread.