Custom size of column when using fixed column

Xinez

i got a problems here,
i'am currently using datatables with fixed column plugin,
it's worked for me, but now i need to custom the width of it column.

[code]

$(document).ready( function () {
var oTable = $('#tabel_daftar_all').dataTable( {
"bJQueryUI": true,
"bPaginate": false,
"sScrollX": "100%",
//"sScrollXInner": "150%",
"bScrollCollapse": true,
"bFilter": false,
"fnRowCallback": function( nRow, aData, iDisplayIndex, iDisplayIndexFull ) {
var index = iDisplayIndexFull +1;
$('td:eq(0)',nRow).html(index);
return nRow;}
} );


//Auto column resize for datatable inside tab
$("#kontenTab").tabs( {
"show": function(event, ui) {
var oTable = $('div.dataTables_scrollBody>table.display', ui.panel).dataTable();
if ( oTable.length > 0 ) {
oTable.fnAdjustColumnSizing();
}
}
} );

new FixedColumns( oTable, {
"iLeftColumns": 2,
"iLeftWidth": 350
} );
} );

[/code]

in that code, i freeze 2 column (in my case, that two column is rownumber column and categories column)
but by using the iLeftWidth, it set these 2 column with fixed width (350),
how to customized these 2 column?
i want the first column to be 50, and the categories column 350
maybe anyone can help me?
thanks before..