`GtkNotebook' has no property named `sensistive'

[Roland Roberts <roland astrofoto org>]

I have a notebook where one of the tabs is another notebook.  When the 
device which corresponds to that tab is disconnected, I want to make the 
tab insensitive.  So in the callback I have something like this:

   g_object_set(tab_widget, "sensistive", FALSE, NULL);

When I actually get to the point of running that code, I get this message:

GLib-GObject-WARNING **: IA__g_object_set_valist: object class 
`GtkNotebook' has no property named `sensistive'

I am very confused.  What am I missing here?

roland

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