Hi There...I work for a loan mod attorney and I am a loan officer so maybe I can help answer your questions.
What type of bankruptcy did you file? Did you file a Chapter 13 and is the second mortgage being paid through the trustee? That might be a reason why you can't modify it.
If not, then here's the thing. Second mortgage rates are usually high because of the risk involved. Simply put, they take a backseat to the first mortgage. Most of the time if the home is foreclosed on then they don't get paid. Which is why the rates tend to be high. Rates are based on risk. A second mortgage doesn't file for foreclosure. It wouldn't benefit them to do so.
If you're paying the first mortgage on time than you should be fine. Keep that as your number one priority. In order for the second mortgage to file for foreclosure the first has to be in agreement with the foreclosure. And if you are paying the first mortgage on time then it wouldn't benefit the first mortgage to do so.
As far as trying to get the payment lowered. The only thing you can really do is talk with Ditech and see if they are willing to adjust the payment as you are facing a hardship. They might request proof of the hardship and then do an analysis to see if you qualify.
There is already a lien on your home from Ditech as it is a second mortgage.
If Ditech is not willing to work with you I would at least send in what you can each month. It's worth a try.
To sum it up, the worst thing that will happen is your credit will take a hit if you don't pay it. The lien will remain on your home until it is paid for. You will not be able to refinance or sell the property until it is paid. But I don't for see them actually kicking you out of your home and filing foreclosure.
I hope that eases your mind. Please feel free to ask more if you need to.