ProxImity sensor problem

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http://forum.xda-developers.com – Hey guys so I'm having the following problem, during a call when I put the phone near my ear and the screen turns off, sometimes the phone stucks, what I mean is the after I remove the phone from my ear the screen remains turned Off and the buttons do not respond.. But the call is still working.. I had gueste rom then I changed to cyanogen but the problem is still there... (HowTos)