Fiddler 2.5.1.0 is not exporting captured traffic to visual studio file

I'm using Fiddler 2.5.1.0 version to capture traffic to our asp.net web api restful services. when I just select part of the entire traffic (like a selected session) and go to File-> Export Sessions -> Selected Session, a little dialog box pops up with a drop down menu on it . I select Visual Studio Web Test click next and saves the selected session as .webtest file.

But when I open that saved .webtest file all I get is

  <?xml version="1.0" encoding="utf-8"?>
  <TestCase Name="FiddlerGeneratedWebTest" Id="" Owner="" Description=""    Priority="0" Enabled="True" CssProjectStructure="" CssIteration=""    DeploymentItemsEditable="" CredentialUserName="" CredentialPassword=""   PreAuthenticate="True" Proxy="" RequestCallbackClass=""   TestCaseCallbackClass="">
  <Items />
 </TestCase>

Where are all the Urls that I was able to capture with Fiddler. I need this file in order to run a Load Test in Visual studio.

I tried visual studio's web performance test but after a certain point it doesn't seem to capture the traffic though in IE when I try to get the data from the database through our Web API I can successfully go through the entire asp.net web api pipeline and see the data getting displayed on the client side. But as I said web test recording stops capturing the URLS in the left side pane of IE, but that's what essentially I need. Any help will be greatly appreciated.