PI 7.3.1 - BPM - Operation mapping not getting imported in NWDS

Hi All,

I am in SAP PI 7.3.1 SP07 - Single stack.

I am doing BPM scenario in AEX. Below is the link I am following :

http://scn.sap.com/community/process-orchestration/blog/2012/06/11/using-netweaver-pi-s-mapping-in-netweaver-bpm

When I am importing operation mapping in process modelling of NWDS, its asking id and password. I gave id and password of ESR and got connected.

But when i am selecting required operation mapping and importing it ,its giving error - " Unable to import WSDL ".

Any idea how to proceed it ?

Regards