I am having problem with Customer Online

In my admin panel i have changed the main timezone of the store to my country timezone but when i go to reports->customers->customers online
In that the last click tab i m not getting the timezone as per my country...
Help me out guys............

Thanx in advance....

i installed additional module but we can do it but we can do it by changing the code also .......
and i want the customer online time also come in same timezone...

how solve the problems plz help me .........

Any help would be great as I really need this to work.

Regards
jay.