asp.net webservice: works in browser but not with jquery call

I built a simple asp.net web service. It works when I put the URL of the service: I see the default Microsoft page and the link to the web method. I enter the parameters and get the expected result.

However, when I use $.ajax to call the service, all I get is a 500 error back. For the url parameter, I enter this:

url: "../WebServices/MyService.asmx/MyMethod",

Could that be it?

1) I put a break point and it triggers when I run the service from the browser but it doesn't trigger when called from the jquery function.

2) Is there something I need to tweak in the web.config file? What does the following mean? It's what I see when I access the service from the browser.

3) Also, I'm sending the data in the format of js开发者_开发知识库on when I'm using the jquery way; do I need to change something in the .cs file?

<string xmlns="http://tempuri.org/">

What could be going on?

Thanks for your suggestions.

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Ok, if someone's bumping on this issue and finds this page, one of the things to do to make the web service work is to add this:

[System.Web.Script.Services.ScriptService]

add it just before your line

public class ServiceName : System.Web.Services.WebService {