Stuck on white screen

i using facebook app when ipod froze , white screen appeared. tried holding lock buttong , home button time didn't work, tried restart didn't work either. plugged in itunes no luck. i'm using ios 5.0.1 jailbroken redsnow.
ipod wasn't dropped or that.

idea problem , how solve it?

 

when plug ipod computer, isn't recognized itunes?

 

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