Hi Praveen ,
Why dont you also schedule the pre-req job also from autosys ?
If you are using a job scheduler ( Autosys) , believe it will be better if all the scheduling are done via that .
I have never used autosys , But believe all the standard job scheduler's will be able to replicate any scheduling already done on a SAP system . Please consult with your 'Autosys' Admins .
Thanks ,
Manu