Bank Owner - executed sales agreement by Seller but not Bank

[John Volpe]

Bigger Peeps,  I put an offer in on a short-sale property.  The seller signed the agreement about a month ago.  I just received an email a month later that the bank made a counter-offer.  Apparently, from what my agent is telling me, the bank has the final decision and my signed agreement with the seller is irrelevant.   Does anyone know what if any recourse I have?