REST API Problem getting access Token

Hi All,

We trying to consume REST API using Oauth2.0 type authentication.

below are the additional information we suing along with Client Id and secret.

Grant Type                : Password Credentials
Client Authentication : Send as Basic Auth header

I've given the images of postman and Oauth configuration of my local site.

as in the first image, When i click "Get New Access Token " in postman , Its navigation to a popup window and asking for login , after that I am getting something like in the first image. Unable to get Access Token.

I've provided Oauth configuration details in the second image. 

Kindly help me to get Access Token.

Thanks.