How to Extract Call Source Data from http://www.callsource.com/ using C# Dotnet ?

Hello ,

I want  call Source Data From  http://www.callsource.com/ in My Asp.net Application using C#

I have  Username and Password of Call source. but how to Take that call source data while passing the username and password through Programming
Fetching the call source Data?

If any one have Solution on this please help me.Its urgent!!