Purchase Order Release workflow

Hi,

To get the SAP inbox mail for release of PO i have done some settings. In define release strategy for PO in workflow activity i have put agent ID as my user ID.Than in Tcode OOCU under MM-PUR i have selected assign agents & made task TS 20000166, TS 20000167 & TS 20000168 as general task & also assigned my user ID to task TS 20000166. Than in activate event linkage i have activated task WS 20000075.

Even after doing the above settings i am not able to recieve mail in my inbox. Is there any other setting that needs to be done.

Thanks

john