a script won't work in one object, but.......

if I copy it and put it in a fresh new object, it works fine..........Is there some kind of parameters that get perminanty screwed up???? It would be rather irritating if I spent a long time on designing an object and then it just won't work becasue I had tried multiple scripts in it...... Maybe there is a way to reset this?

There's an occasional bug like this that all the scripting residents know about. I'm not sure what the official position on it is, because I'm not sure that anyone can say do X, Y, Z and bang here it goes.

The answer is, as you've found, to make afresh and put the scripts in and off it all goes happily.

I probably average 2-3 hours per day scripting and I've had it happen a few times in my time in SL. It's possible that you're scripting more of the "danger sign" scripts (and I don't know what they are but I assume there's some combination that makes them go bye) than I normally do, or you got unlucky, but it's not, for most of us, a significant problem - although it IS a major PITA when it does happen.