1. Double posting is against the rules (except for certain circumstances which don't apply here). Triple posting, more so. It doesn't matter how long you've left between them.
2. Are your tilesets actually different?
3. Have you been testing it by changing your computer's date?
4. Have you put the script in a new script section just above Main?
5. Maybe you broke something when you tampered with the script. Check it again.