Hi Steve,
BTW, thanks for your help.
Sorry, I'm sure I'm not being clear, so let me try again.
We have a portal we log into. This portal authenticates the user. Once they
are authenticated they are then passed off to the Sharepoint server. there
the ISAPI filter recieves the security info from the orginal portal for
authentication and allows them to access the SharePoint server.
If I'm logged into the Sharepoint server and I select Edit Page in
Frontpage, then frontpage opens and takes me to the portal login screen. When
there, if we select the Preview tab at the bottom of the frontpage, we can
then select the login link and login to the portal. Once we do this, the
security info is saved on the logal machine and we can then access the
SharePoint page for editing. So the preview page tab is needed to login so we
can be authenticated.