Create External Content Type using REST service listdata.svc using Sharepoint Designer 2013

Hi,

I have Sharepoint 2010 site and it contains list. when i hit url <siteurl>/_vti_bin/listdata.svc/DemoList it shows proper xml content. Now i want to use it to create external content type in SP2013 site using SP Designer 2013. So i tried as follow:

 [A listdata.svc?wsdl wont worked for me so i choose to go with Metadata Exchange option.]

Above settings, throws error as below 1st image.

Then i made site to anonymous as well but still i am getting error as below 2nd image.

I gave credential to 2013 user in sp2010 site as full control as well and even made it as system admin. Please provide solution how to achieve this.

Thanks in advance......