Thanks for your response!
I still seem to have the same behavior, NO admin or host tabs upon login.
I have verified that all software firewalls are completely disabled (XP's and Norton Systemworks). BTW, the Control Panel (or admin / host tabs) are NOT displayed (In fact, there is NO visable difference on the default splash screen when I log in as either admin or host).
I have tried to re-install (w/ a fresh DB) a few times, everything installs fine but I never get the admin tab.
Note: The only non-standard step I need to do during DotNetNuke (v3.0.12) install is put a <clear/> in the httpModules section in my web.config otherwise I get a"'UrlRewrite' already defined" configuration error reading the web.config. I did have DotNetNuke 2.1.2 install previously. (The admin tab worked on that version). Before installing v3.0.12 I removed the 2.1.2 versions physical directory and the virtual-dir from IIS. Plus, I am installing v3.0.12 into a NEW local database. I do not know why I get that config error w/o the "clear". I've verified that my home directory (c:\DotNetNuke) and default document are correcly set in IIS for the default web site and I do NOT have a web.config my Inetpub\wwwroot dir.
ANY other ideas on why the admin or host tabs would not show up when I login as either admin or host?