2008 server job scheduler to run robocopy

Trying to schedule a job using the job scheduler on a microsoft  2008 server. Below is the command  I am trying to run. It works manually on the command prompt but will not work in the job scheduler.  Drive z: is a mapped drive on the backup server, the actual drive letter is d:. I am trying to backup a shared drive on  the main server to a shared drive on the backup server every nightly.  

   robocopy d:\shared\sus\ z:\\valley2\sqlbackups  /copyall

 

      

  

Check this if it works for you...

http://forums.techarena.in/server-scripting/796498.htm

the batch file throguh windows scheduler