/jsdebug returns blank page

Hi,
 
I created a very simple webService using the VS2008 template. i am planning to use Ajax call for the webService.
 
when i try to open my webservice in IE browser using following link to see the Javascript proxy, it return blank page.
http://localhost:60020/Service1.svc/jsDebug
 
any idea whats wrong with it ?
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