jQuery AJAX Post not calling Web Service Web Method in ASP.Net

Hi,

I am using Asp.Net 2.0.I am trying to learn webservice and call that webservice using jquery ajax method

The problem is jquery ajax is not working properly and i could not find out where i have gone wrong.

Here's my jquery code

    <script type="text/javascript" src="http://code.jquery.com/jquery-1.9.1.js"></script>
 <script type="text/javascript">
 $(document).ready(function(){
    $("#Button1").click(function(){

        $.ajax({
            type:"POST",
            url:"/WebService.asmx/GetDateTime",
            data:"{}",
            contentType:"application/json; charset=utf-8",
            dataType:"json",
            succss: function(msg){                  
                alert("Success");
            },
            failure:function(response){
                alert("Error");
            }
        });
    });
 });

 </script>

Heres my webservice 

[WebMethod]
public string GetDateTime()
{
    return DateTime.Now.ToString();
}