XForms on mozilla can't get it to work

Unknown <[email protected]>
Newsgroups gmane.comp.mozilla.devel.xml
Organization Another Netscape Collabra Server User
Message-ID <[email protected]> 
Hi,

I just installed the XForms support on mozilla 1.8a and
firefox (linux builds) from
http://ftp.mozilla.org/pub/mozilla.org/extensions/xforms/beta1/linux/xforms.xpi.
But i can't get examples
(http://www.mozilla.org/projects/xforms/calc.xhtml and
http://www.mozilla.org/projects/xforms/sample1.xhtml) to work.
They are rendered like html page.
After install i did a browsers restart , is there any other thing
that i'm missing ?

Best Regards,
Mitko
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