JQuery Autocomplete Not Working With Webservice?

Mar 24, 2011

I have this code:

$('#' + textboxID).autocomplete({ delay: delay, source: ["cats", "dogs"] });
which works fine.
I want to use a webservice:
$('#' + textboxID).autocomplete({ delay: delay, source: webserviceURL});
This doesn't work. My webservice URL is /blah/blah.asmx/myMethod
The webservice definition is:
[WebMethod]
[ScriptMethod(ResponseFormat = ResponseFormat.Json)]
public List<string> myMethod(string term)
{
// Logic here, return list of strings
}

The method never gets called. Can anyone point me in the right direction? I have other webservices in the same .asmx which work fine with other controls (other controls are using $.ajax to call them).

Edit: Getting closer, I now get a 500 error saying Request format is unrecognized for URL unexpectedly ending in '/myMethod'. I think it's not treating my url quite right..

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