after upgrading to ios 7 on my ipad iTunes does not list any music, videos or anything else. only the interface displays. any idea what the problem might be ? thanks.

Greetings:

 

After upgrading to ios 7 my iPad doesn't show content on ITunes.   The music,  video and other icons are displayed but none of the titles. Any idea what I might have done wrong during the install ?

 

Thanks.

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