You do understand the trustee represents the interest of the creditors not you? This is a matter between the Chase and the Trustee.

I disagree with Lehk, while the trustee can't force the lender to take a short sale, there is plenty of incentive for the Chase to take the short sale and run rather than having to ride out the stay and hope that the borrower isn't still going to continue the default and they ahve to foreclose and likely end up with an REO.