G-Shock GD-100-1B Model 3263 / Unable change to 24 hr?

Hi -

I am spending hours on how to change from the 12hr to 24 hr format on this watch.
I just got it. Please help.

The manual and the features say it can do 24 hour, but I guess not. I think its only in 12 hour format only.

And I tried every steps in the manual with no luck.

Please help. Thanks.

Following these instructions, you should be able to correctly set it right now :

Ok I got it solved now. After 3 hours or so......:culpability:

THANKS!!!!