disable "forward as attachment"

In Outlook 2007, the (Actions) tab of the custom form, there is the default
Forward which you can change to "No" and it disables the forward action.
When I create a new Action, I do the following:
Action name: Forward as Attachment
I uncheck "Enabled"
Form name: I choose "message" and it defaults to IPM.note messge class
In the "Characteristics of the new form", I choose in the "When responding"
the option "Attach original message"
in the "Address form like a:" I choose "Forward"
In the (Properteries) tab, I check "Send form definition with Item"

When I publish the form, I can still forward the message as attachment. I'm
not sure what I'm doing wrong to turn off this action. Any help is greatly
appreciated.