Using jQuery to parse XML

Using jQuery to parse XML

First post.
 
Looking to parse the XML file a perl script sends back. I want to get values from specific tags in the XML file. Here is my code:
 
$.ajax({
   type: "GET",
    url: 'http://servername/cgi-bin/findwhoisonduty.pl?host='+groupName,
    dataType: "xml",
    success: function parseXml(xml){
     
     $xml.find('ax21:user').each(function(){
      var firstName = $(this).find('ax21:firstName').text();
      var lastName = $(this).find('ax21:lastName').text();
     });
     alert(firstName + " " + lastName);
     }
   });











 
 
The code seems to be getting hung up on the dataType: "xml", line because when I comment it out, it goes to the next step and executes the function (although it doesn't do anything).
 
Are there any suggestions as to how I can change this or just take a different approach? Let me know if I can provide more information.