Have you added the TV series folder to Mezzmo as a folder or have you scanned the folder to add the files? Adding the folder will allow Mezzmo to check for new files and add them to the library, scanning for files will just add them once and then to add new files you will need to scan the folder again. See http://www.mezzmo.com/wiki/doku.php?id=adding_folders&s[]=add&s[]=folder for more information.
Bookmarks