If you are on stock 4.0.4 you probably lost root like I did.  It still worked for apps I had already given root to but not for new ones.  If you are having problems with root try flashing this su.zip - File Shared from Box - Free Online File Storage it worked for me and someone over at droidlife said it was a fix to the problem.
				
			 
	
 
 
		 
 
		
 
 
		 
 
		 
 
		 
 
		 
 
		
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