jQuery Grid Plugin - jqGrid

Hi,

I am using demo code   http://www.trirand.com/blog/jq.....qgrid.html which is

jQuery("#scrolling").jqGrid({ scroll: 1, url:'bigset.php', datatype: "json", height: 255, width: 600, colNames:['Index','Name', 'Code'], colModel:[ {name:'item_id',index:'item_id', width:65}, {name:'item',index:'item', width:150}, {name:'item_cd',index:'item_cd', width:100} ], rowNum:100, mtype: "GET", rownumbers: true, rownumWidth: 40, gridview: true, pager: '#pscrolling', sortname: 'item_id', viewrecords: true, sortorder: "asc", caption: "Loading data while scrolling" });

for my jqgrid for loading data while scrolling but my grid is not showing the same behavious as per this code for loading data while scrolling

in my jqgrid i am using pagination but because of pagination my column sort is not working So i am trying Loading data while scrolling.

If any one can help me out its very urgent. Thanks in advance