integration Configuration is not opeing NWDS?

Dear Experts,

I am new with NWDS working with SAP PI 7.40 dual stack, I am importing the IR/ ESR objects in to NWDS, configured Integration Directory part properly and test connection successful. But when I am opening ID/Integration Directory / SAP Process Integration Designer getting error message.

"SAP Process integration Designer is supported for AEX usage type for release 7.31 onwards."

give me how to connect NWDS of ID objects?

Regards,

Kiran Polani