Your browser must be set up to accept cookies, which store your password for the duration of your session and let you move freely throughout pages in the secure section. 

To set your browser to accept cookies, follow these steps:

In Internet Explorer 6.x:
• From the top menu of your browser, choose "Tools" then "Internet Options..."
• Click on the Privacy tab and move the slider down until the reading says "Low"
• This setting will still restrict cookies from other sites that would use personally identifiable information.

In Internet Explorer 5.x:
• From the top menu of your browser, choose "Tools," then "Internet Options."
• Click on the Security tab, then on the "Custom Level..." button.
• Scroll down to the topic "Cookies" and click the "Enable" radio button. Click "Okay."

In Firefox:
• From the top menu of your browser, choose "Tools," the "Options"
• Click on the Privacy icon, then the "Cookies" heading
• Select the check box in front of "Allow sites to set cookies" and set the Keep Cookies drop-down to "until I close Firefox"