First please go trough the details provided in this forum thread, and verify the service responds by testing its URL in browser.
- If the service does not respond double-check its settings. If the service is hosted separately, you may need to enable CORS. Also check if all HTTP methods are enabled in the hosting environment.
The best troubleshooting approach in such cases is to use the browser's console or Fiddler and check the failed requests. Thus you can see if relative paths (for JS/CSS/HTML files and the viewer's serviceUrl) in the application are resolved correctly. You can use Url.Content("~") method to get the proper base for the relative paths.
You can also check the local demos installed by default under C:\Program Files (x86)\Telerik\Reporting Q2 2014\Examples\CSharp.
If you need further help, please open a support ticket and send us the log file created by Fiddler, including the related project files to check the settings.
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