The autoexec.lfs file (not folder) has to be directly in the script folder. It will not work if it's in a subfolder.
Move the autoexec.lfs file from the autoexec.lfs folder to the script folder so the path is "...\data\script\autoexec.lfs" not "...\data\script\autoexec.lfs\autoexec.lfs".
(you will probably have to rename the autoexec.lfs folder before moving the file because for some reason Windows doesn't allow names of files and folders to be same)