jQuery Grid Plugin - jqGrid

I have a web server set up and running on my machine, and I can post an XML document to the server and process the response from the server(which are also another XML document).

I enter the address as “server ip:13310/stat/tasks”, minus the quotes,and 13310 is the porter number.then I can get the XML data in browser.
but When I use the “jqgrid”,I can't perform the XML data to the grid with the following code.

=====================================

jQuery(”#list19″).jqGrid({       
    url: 'http://127.0.0.1:13310/stat/ta.....s',
 datatype: “xml”,
    colNames:["TASK_ID","START_TIME", "END_TIME", "ENABLE","DESC","STATUS"],
    colModel:[
     {name:"TASK_ID",index:"ID", width:80, xmlmap:"TASK_ID"},
     {name:"TASK_START_TIME",index:"START_TIME", width:180,align:"right",xmlmap:"TASK_START_TIME",sorttype:"date"},
     {name:"TASK_END_TIME",index:"END_TIME", width:180, align:"right",xmlmap:"TASK_END_TIME", sorttype:"date"},
     {name:"TASK_ENABLE",index:"ENABLE", width:130,xmlmap:"TASK_ENABLE"},
     {name:"TASK_DESC",index:"DESC", width:100, xmlmap:"TASK_DESC"},
     {name:"TASK_STATUS",index:"STATUS", width:100, xmlmap:"TASK_STATUS"}
    ],
   height:250,
    rowNum:10,
    rowList:[10,20,30],
    imgpath: gridimgpath,
    viewrecords: true,
 loadonce: true,
 xmlReader: {
   root : “TaskList”,
   row: “Task”,
   repeatitems: false,
   id: “TASK_ID”
 },
 caption: “TASK LIST”

});
==================================

but I put the XML document on my own localdisk,the program workwell,the code like this.

===================================

jQuery(”#list19″).jqGrid({       
    url: 'tasks.xml',
 datatype: “xml”,
    colNames:["TASK_ID","START_TIME", "END_TIME", "ENABLE","DESC","STATUS"],
    colModel:[
     {name:"TASK_ID",index:"ID", width:80, xmlmap:"TASK_ID"},
     {name:"TASK_START_TIME",index:"START_TIME", width:180,align:"right",xmlmap:"TASK_START_TIME",sorttype:"date"},
     {name:"TASK_END_TIME",index:"END_TIME", width:180, align:"right",xmlmap:"TASK_END_TIME", sorttype:"date"},
     {name:"TASK_ENABLE",index:"ENABLE", width:130,xmlmap:"TASK_ENABLE"},
     {name:"TASK_DESC",index:"DESC", width:100, xmlmap:"TASK_DESC"},
     {name:"TASK_STATUS",index:"STATUS", width:100, xmlmap:"TASK_STATUS"}
    ],
   height:250,
    rowNum:10,
    rowList:[10,20,30],
    imgpath: gridimgpath,
    viewrecords: true,
 loadonce: true,
 xmlReader: {
   root : “TaskList”,
   row: “Task”,
   repeatitems: false,
   id: “TASK_ID”
 },
 caption: “TASK LIST”

});