how to add wsdl web service with .xml extension in c#, mvc

Question

this is my web wsdl web service url . so I want to add this as a web reference.They have used open source software called soapUI.exe. Should I have to use this or is there a way to do this. I tried with visual studio like follow,

solution explorer ---> References --->add service reference -->advanced ---> add web reference ---> place the url ---> press go.

then it popup a warning window more than 20 times like this

I have no idea.hope your help