[ubuntu] dash preview for music lens not working properly

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http://ubuntuforums.org – i installed quantal quetzal a few days back n now I’ve run into a small problem when i right click any music file in my hard disk(i.e. locally) in the dash, the preview feature does not work correctly.. I’m not getting the option to open the file or the containing folder also the file i attach should give a clearer picture i feel this has something to do with me changing the default music player from rhythmbox to banshee but i may be wrong is there any solution for this problem? oh and btw, the online music plays perfectly from the dash preview... its only the local music that is behaving we (Hardware)