recently, i was having a problem getting a scheduled task to run a batch file. i would check after the task was supposed to run and it clearly didn’t run. the solution was to open the scheduled task properties up then go to the Actions tab. edit the action and add the directory the batch file is in to the “Start in (optional):” entry.

source:
http://social.technet.microsoft.com/Forums/en-US/winservermanager/thread/d47d116e-10b9-44f0-9a30-7406c86c2fbe

also, i really dislike the new layout of task scheduler…seems so convoluted.