Can't update Front Row !

Help !! I've been using Mac's for sometime now and I have to admit this problem has stumped me. It's the every progressing debate of Front Row not updating.

I have a library of some 100 TV Shows that I own on DVD, have slowly been ripping them onto my external HD. Whenever I have put them into Itunes, they have always landed in Movies, I have then changed the media Type to TV Show and they have gone into the right place on iTunes. However with the addition of a new iMac which runs FR, unlike my old one, I've been using that. However, I cannot get FR to update the movie list correctly, and it's still showing the TV Shows, even tho I have moved them into TV Shows.

This therefore means I have a listing in Movies, and a listing in TV Shows .. how do I get FR to update !!! It's a great little program, but this is really frustrating me. There is no duplication in iTunes, so why is there in FR ..

PS .. I'm now computer geek, so please write answers suitable for a three year old !!!