hello,

on running asp.net configuration

following details are displayed

Welcome to the Web Site Administration Tool

Application:/NopCommerceStore
Current User Name : proton

Security   Enables you to set up and edit users, roles, and access permissions for your site.
Application Configuration   Enables you to manage your application's configuration settings.
Provider Configuration   Enables you to specify where and how to store administration data used by your Web site.

on clicking Security following error is displayed

There is a problem with your selected data store. This can be caused by an invalid server name or credentials, or by insufficient permission. It can also be caused by the role manager feature not being enabled. Click the button below to be redirected to a page where you can choose a new data store.

The following message may help in diagnosing the problem: The method or operation is not implemented.

regards,