Change the Authentication mode to "Forms" for the web.config file in the login directory. You are turning off Forms authentication when you enter the directory with the login files since a local web.config takes precedence over other web.config files. Also look at the GetAuthCookie, SetAuthCookie, and GetRedirectURL methods of the FormsAuthentication class. My thinking is that you will need to manually change the cookie dynamically to the application you are currently running.

>Sorry for running you in a circle, but I think something just clicked here. The problem I have with making it the same is that the name of the cookie will be the same for all apps. I just want to have one login page, and be able to authenticate users for any other app I add, with different (app specific) cookies. Is that not possible using this? I was under the impression that simply including a name for a cookie in the protected apps web.config would pass that name along to the login page. This is obviously not correct. Is there a way to do that, that you know of? Thanks for all the help, Cathi!
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>>Make the wlogin web.config file the same as wphyscnt except change the relative location of the loginURL.