jQuery Grid Plugin - jqGrid

Hi,

I am using JqGrid-4.5.4 with JQuery-1.10.0 for creating my grid with following configurations:

A) Datatype:json

B) url: <server-url>

C) "Grid headers are grouped"

D) At a time grid is showing "100-records out of 10000-records", sorted at server-side.

Now, my business requirement is to provide a facility in grid using which user can sort (asc/dsc) grid records.

But I am not able to implement "sorting" on "grouped headers".

So, I am wondering whether latest version of "JqGrid" library provides options to implement above said requirement or not ?

Could anyone please comment.

 Thanks