I am trying to configure my Windows Media Center (Windows 7 Ultimate). I selected folder with my movies and added it to the library, but when I went to the movies library, it says "There are no items in this library yet - Windows Media Center is searching for media files in the background...". I have all necessary codecs installed, Windows Media Player opens those movies correctly. When I right click on the file -> Open with -> Windows Media Center it also plays them without any problem. Any ideas why they don't appear in the libraries?

Edit:

• Movies are coded with divx and xvid codecs and they have ".avi" extension. Windows doesn't have problems playing them.

• I told Media Center where the files are. I even pointed Windows Media Center to a folder with only one .avi file it still couldn't find anything there. (I have given it quiet some time, even though searching in the directory with only one file shouldn't take more than a few seconds.)

• When I add a folder with a lot of movies, I get a dialog box "You can wait while media is added or select OK to continue using Windows Media Center.".                                                                        At the end it says it added about 90 movies, but when I go to the libraries, it's still empty.