NWDI:Communication with the CMS failed

Hi All,

We are trying to setup NWDI in our landscape.When we are going to setup an NWDI Track for EP 7.0 SP16 ,getting the message

Validation Error: Communication with the CMS failed. Ensure that the URL is correct, that the CMS is up an running, and that the given user has administrative access rights for the CMS

Can any body help us.We are new to NWDI.

Regards,

Vijay