Question about my Real Estate Agent

[John Roberts]

I have a Real Estate Agent that I worked with on a past purchase.  I am purchasing another duplex, so I contacted her again to be my buying agent.  We submitted an offer and the listing agent/owner countered.  When I asked her (my agent) a question about the offer I was submitting, she said that she had to stay impartial and really couldn't give me any advice.  Is this true?  I could understand if she was the listing agent, but I contacted her to represent me.  

Thanks.