my computer is a HP pavilion dv6000 and i'm runing ubuntu 12.04

so here's my problem... when i try to broadcast on cam4 nothing happen except loading, my mac is working on other website... so i went to flash player setting, but everything in order and still nothing change, i tried to open firefox whit terminal and here's the message that i got:

(flash-player-properties:21159): Gtk-CRITICAL **: IA__gtk_widget_set_sensitive: assertion `GTK_IS_WIDGET (widget)' failed

i'm kind of lost of what i.m supposed to do
thank for your help,