>Both frames are on the same Portal...
I've no exact definition of what is "on a Portal"...

>What can I verify to understand why the object is denied ?
cross domain scripting tries to inhibit accessing parts of the
object model from different internet domains.
>
>Is there a way to access the InnerHtml ?
Depends on what lengths you want to go <g>.
There are older versions of IE which have more loopholes...
OTOH even then there were some sites blocked by intent.
A few I was interested in I could unlock, but that sometimes took time.

>What should I be looking for in the HTML ?
the URL's

regards

thomas