Joomla wrapper & Session has epired. Unable to process incoming request

> Hello,
>
> I am using joomla for my website. i've developed a form with Orbeon that i
> want to include in my website in a i frame. Unfortunatly i get a : Session
> has epired. Unable to process incoming request on internet explorer 6, 7 and
> 9.
> On all the other navigator like safari, mozilla or google chrome, i do not
> have this error. How Come.
> What am I doing wrong ?
>
>
> Best messages,
>
> Xavier
> http://orbeon-forms-ops-users.24843.n4.nabble.com/file/n3816916/ScreenShot002.png
>
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>
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