Issues when returning to stock

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http://forum.xda-developers.com – Looking for a little help please. Trying to return to stock and I have flashed 2 different stock roms from samfirmware, nd each time when booted it tells me messenger has stopped working. If I open the app it force closes. Any idea what might be causing this? I need it back to stock ASAP as I am selling the phone. It's starting to give me a real headache at the moment Thanks in advance Sent from my Nexus 7 using xda premium (HowTos)