Vista - Autorun

I am working on a simply backup solution on a new dell with vista, I made a
batch script that would simply use ROBOCOPY to automatically back up certain
folders. I made an autorun.inf file that works fine on another computer to
call this batch script, and the batch itself runs fine when called manually,
but autorun refuses to work. I have tried many things to fix it.
Additionally, when I right click on the drive and select "Open Autoplay" the
screen slightly flickers but nothing else happens.