Security assist not recognizing login

Within PowerCMS, I have added a link to a new page that I created, which is NOT a page created in security assist. This page opens in a new, pop-up window. To this page, I have applied the same security rule that Power CMS is using, but it's not registering that I AM logged in. The rule is the same: Grand access if Administrator; if access denied, go to ../admin_cms/users_login.php. Every time the page loads, it redirects me back as if it doesn't recognize that I am logged in. I've already cleared my cache and tried it in a different browser, but it keeps redirecting me. What have I overlooked? FYI, it's the same site you just worked on with me this morning, so you already have FTP info to it. In fact, it's the same page you just looked into - with the HTML editor on it. Thank you.