Are you trying to remove the pan? I couldn't get the back screw loose on mine either. Also had to use a mirror to see what was in there. I had a socket wrench on it but there was no bloody room to break it loose. If it is like my 2000 i would do like i did and just bend the linkage a bit with a large crescent wrench and then bend it back afterwards. The last thing a person wants to do is strip that screw.
Edit: I meant bend the "mounting bracket" that you were trying to remove.
I read somewhere that people have pulled the fuse out as a temporarily fix. But i am not sure if that would work in your case. You would not have the abs of course, but would be safer than the alternative.