title: Method Error 500 for CascadingDropDownExtender in AJAX
body: <p>I am working on CascadingDropDownExtender in AJAX. When I run the sample, I am getting “[Method Error 500]” in the Dropdowns. I wrote a Web Service (carService.asmx) to get the values from the XML (carService.xml) into the Dropdowns. Even the Web Service is not invoking correctly. When I run the Web Service, an XML is generated with errors. Please help me with the solution. Thanks.</p>