windows phone 8 - Nothing happens after clicking a button -


first of , question title may bit irrelevant. don't know how put title little mess. developed simple windows phone 8 application few days earlier. today added necessary images project submitting in app store. when tried build in release mode, compiler gave me exception in app.xaml.cs file in line : 

phoneapplicationservice.current.useridledetectionmode = idledetectionmode.disabled;

then commented out line check & after application running. after clicking on button in home page, app has gone in idle mode & doesn't navigate other page. page navigation code : 

navigationservice.navigate(new uri("/category.xaml?", urikind.relativeorabsolute));

can please tell me happening here ?


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