Default Barcode Scanners not working????

welll im new here and im at noob at this soo i was trying to scan the barcodes for cm updater themes and when i downloaded the barcode scanner and installed it as soon as i open it i get a FC so i tried to install another barcode program and that one was the same. i would really appreciate if you guys can help me.
i have CM 4.2.9.1 with the blue eclair theme and the 10 mb hack.
thanks