[schapplm]

I noticed this behaviour too on XBMC 13.2 with a db file on a windows share. It did not solve by moving the file to a nfs share (see posts above).
Therefore I added an option to make a mysql database for the addon. Since you already had the addon installed, you still had the not-working SQLite DB File option activated. I kept this option for down-compatibility.
You have to change the addon configuration. Instructions how to configure the addon is in the addon wiki.
Instructions how to migrate from SQLite to mySQL is also in the wiki