Lucky me

I hate court. Anyhow, further to my previous thread titled advice puh-lease, my ex is taking me to court. I received all the materials, and have gone over them, but I am just kind of stumped as of how to respond. He has not paid support in six months and wants to get all support payments stopped. He also wants all the back support payments that have accumulated over the last six months to be erased, because he has been off of work. All the doctor's reports that he has sent with his affidavit state that they have found NOTHING WRONG WITH HIM! But the ex is still insisting that his family doctor says he should not return to work. Umm.... he says he has not received any money from anywhere, although he does not state whether or not he tried to get any. His work benefits cover long and short term disability, but apparently he is not receiving any. Is he not supposed to receive them if his family physician says he shouldn't be working? I don't know. All I know, is I don't know how to take a stance on this. All I know, is whether I am working, sick, debilitated w/e, I still have the responsibilities of making sure my kids are financially taken care of (as well as emotionally and physically). I can't just say, hey let's forget about it for a while, so why should he be able to? I do rely on a portion of his payments monthly (sadly, but that is the way it is) and am so beyond repairable in debt now, but I don't get to just go to court and ask all is forgiven. I guess I am kind of ranting (sorry). Anyhow, how do I respond to this??? I don't think he should be forgiven his arrears, and I don't think that he should be able to just stop paying (even though he claims no income right now), because, I don't get to do that. And also, all the other doctor's that have looked at him say he is FINE.