Okay that worked. Now when they login instead of the code taking them to myurl.wp-login.php it now takes them to the member login already established before installing Simple-Press.  That is what I want. But – How do I get the person logging into the member area via the forum to be redirected to the forum url? Now, when they log in they go instead to the pre-existing member area.

If your login procedures no longer use the built in WP functions then redirecting is almost certainly going to need to be done by the member/login plugin. ask if they have a redirect option that can be applied.