Crystal Reports with Asp asking for login

Question

Hi I'm totally new to Crystal reports I made a report and i added the data set (.XSD) and used a report viewer and report source in a page to show it but it shows a login screen instead but when i tried the machines login because i use integrated security but still no use but the report is showing the data when i click show preview in VS


What do i do ???
I'm using C#

Any help or sample Source would be grateful.