Workflow Overview is not displayed

Hi Guys,

I need one help.

Actly I have created one custom workflow ( WS90000156) and custom business  objectZPM_MRREPO (without any supertype).

all are working fine for notification creation (IW21) and is going to appropriate Approver.

But i am not able to see its log in IW22 transaction:

Workflow-> Workflow Overview.

Please help. Any help  will really be appreciated.

Thanks & Regards,

Gaurav Singh