Hi. Please let us know what errors you get when posting requests for help otherwise we have to guess at the problem.
My guess is that you're getting an invalid regex error message?
I don't know the structure of the file you're replacing the content in but I've been lazy and not matched the whole string explicitly. I've told it to just replace any string that starts with FORMS and ends with a bunch of other stuff. We can get a bit more specific with the regex if that's going to be a problem (i.e. if more than one line in the file starts with FORMS).