on your login screen select options, on the second screen after hitting next you will find the video options, reset it back to default. log into the game, (everything will look distorted and blurry) use the EQ button and reset your resolution to your liking. log out to save your settings and try logging back in. i have to do this every time I plug or unplug my external monitor from my netbook or I get the same error. 
 
hope this helps 
cheers 
		
		
		
		
		
			
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				Bristlebane Server - Leader of <Celestial Ruin> from 1999-2004  
Bristlebane Server -Member of <Triadic Order> from 2005-2007  
			 
		
		
		
		
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