SAML SP initiated SSO for Biller Direct

Hi

We are running NW 731 and we have configured in the SAML Wizard SAP as both IdP and SP.

But we are going to be using SAP only as a SP. Our IdP is a 3rd party provider (PingFed) and we have imported the IdP's metadata in the SAP portal system under the list of Trusted Identity providers.

We modified the Authentication template(form) that is being used by the Biller direct applications, so that SAML is the second option as per help.sap.com

link:

Adjusting the Login Module Stacks for Using SAML - User Authentication and Single Sign-On - SAP Library

Now when we open the application URL using:

https://<hostname>/bd

We see the standard Biller direct logon page and not the redirection to the IdP's website to authenticate. What are we missing? How do we force the redirection of the URL to go the IdP's website/IdP logon page and then back to the Biller Direct application.

Any advise would be appreciated.

Thank you

Abhi