Notification Services failed to get the metadata for the s..

Hello All,

I am running into an error in deploying my NS app into production. I
have a separate Web Server and Database server.

when registering my NS Instance,

I am using a domain account to create the windows service ( specified
in service logon) and
using sql server authentication for the authentication part.

I specified sql server authentication ( user id=xx;pwd=xyz...) in the
web.config file of my Subscription Management Web App.


when I run the web app and try to get subscriptions added I get this
error:

Notification Services failed to get the metadata for the specified
instance.

I did the nscontrol register on the web server successfully.

What is going wrong?

TIA
sudhakar