Since you don't know for sure what is causing her to act this way just take it slow. She is a not too old to learn to trust but she is old enough to know she is in a new strange place so I'm sure she is a bit scared and nervous.   
Just be gentle and sweet with her. Move slowly so as not to startle her. I would continue to pick her up and let her know it is OK to sit with you and socialize. I think getting down on her level is a great idea. She she may not have been socialized very well but now she is in a place where she can learn to lighten up and enjoy life. Since the people lied to you about her age I would be a bit suspicious about their other behaviors as well.   
The great thing about dogs is that they continue to learn even as they get older and 6 is not very old for a Yorkie. As long as this dog does not have any genetically transmitted personality issues she will come around with time and lots of love.         
					
						Last edited by gracielove; 12-19-2012 at 03:57 AM.
					
					
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