How can I avoid a second Trust Deed loan, after chapter 7, if there was no proof of claim filed by second holder?

1. The problem is, I filed Chapter 7, it was discharged and second lien holder Residential Capital did not filed a proof of claim until 09/03/10. I was discharged 09/01/10. The second lien holder is not coming after me for any payments. However, they are declining to sign the Modification subordination agreement for them to remain in second position. By them refusing to do so, loan modification will be cancelled and home could go back into foreclosure again. I was advised they would not sign unless I pay them a substantial amount of money, which I don't have. That is why I filed for bankruptcy in the first place. I feel the second Trust Deed is blackmailing me, using unethical business practice. The bank has taken our loan out of foreclosure for now. However, I was advised if Residential Capital doesn't sign agreement, our property would go in foreclosure again.(Clouded Title issues). I live in Southern California, our mortgage is underwater. We owe the bank $325,000.00, Second TD (Residential Capital),$65,000.00. Most recent comps reflect our property is only worth $249,625.00. There was neither equity for second T.D. holder nor the first. In other words, second loan, I believe charged off thru bankruptcy. However, second lien remains. Can you suggest my next course of action? Any advise given would be highly appreciated.