You want: "chmod 6544 startup" which actually is rather clever. When executed by root, the script will run as user=apps and group=appsgp. But this set of permissions has collided with another use of the sgid bit and ls is displaying the permissions as a manditory file lock. I complained about this in my "Unix File Permissions" article, but my example was a little bit contrived. This is a real-world example of the point I was trying to make.
See Unix File Permissions for the full story.