Datatable Sorting image position

pal_2486

I am using JQuery datatable and wanted to move the sorting image say the sorting arrow image should be 10px to the right of the column headers. By changing the below css property to either left or right or center doesnt seem to work for me. i want the image(Sort image) to be 10px to the right of the cloumn header name .Say column header to be Account Manager Name.

[code]
.sorting_asc
{
background: url('images/sort_asc.png') no-repeat center center;
color:#000000;
text-align:left;
}
[/code]

Please help.
Thanks