autostart stopped working - doesn't open file as it should

[uhoh]

While burning a Mac/ISO hybrid CD, I designated a file on the Mac side to autostart when the CD appears on the desktop. I've done this before and it always works, until now. I double checked with a commercial CD that I know
also autostarts (worked w/o problems until now), and that didn't work either. Is something in my System Folder corrupted or missing? -- Thanks for suggestions!

 

[gunthnp]

what mac check the apple cdrom ext and if it a third party check cd rom tool kit ext