ALT-Gr Key mapping help needed

["ViSHWANATH CK" <veeseekay gmail com>]

Hi,

Am using firefox on hp ux system and using a french keyboard,
I realise that the ALT-Gr characters(like @ ,etc) do not work.
I ran the GTK-Demo program and the ALT-Gr characters do not show up.

However, I also have a linux box where the ALT-Gr keys work fine.

The version of GTK used is 2.6.8.

Can you please let me know if any of you have faced such issues and if there is a method of making the ATL Gr characters appear on my hpux firefox?
Is there some setting I am missing?

thanks in advance
Cheers!