I think it is your ISP that has set up a condition to not run .php pages that are set up with full permissions. I think the problem was the full permissions we set up on the files in the first place. Full permissions might be the problem and not the solution. Like I said, at least one user reported changing from full permissions "777" to permissions "755" fixed it for them.
We can have someone call you, but it is likely that we will have to ask your ISP what permissions will work to allow .php files to run from that directory.