I have a script that zips and moves a copy of our database (Thanks Rob Russell) to a second location on a different drive. I've used this at at least 15 of my customer locations and it always works. But at one site the script does not appear in the drop down of scripts. (It is the exact same script with only a path change inside.) Yes, I have put it into the 'Scripts' folder.

But when I create a new schedule to run the script, it will not appear in the drop-down list. Weird. Any clues, anyone?

Only a guess, but check the permissions on the script file.