Handling Custom workflow with Z screen in My Inbox

Hi all,

We have integrated a custom workflow for PO approval process to My Inbox. The custom workflow is having the following tasks:

1. Approve/Release PO
2. Reject PO
3. Change Approver

The Approve/Release PO is working fine. But in case of Reject PO and Change Approver, the custom workflow is calling Z screens. Hence the task is not getting completed while called from My-Inbox.

We require the exact functionality of the custom workflow to be integrated to My-Inbox.

Please suggest any means to achieve this requirement.

Thanks in advance.

Regards

Sobha S