There are a few reasons why the session expiry error is displayed when accessing the Online Control Panel Control Panel.

First, the cookie settings on the local browser may be too restrictive. The settings should allow the control panel server to set cookies and any firewall or proxy software should be set to allow the cookies to be sent back to the server.

Second, the clock on the local machine must be accurate to within 30 minutes. When using the AOL browser, this is complicated slightly, as the browser maintains its own time zone, separate from the system time zone. Both must be accurate.

Finally, it may be that the account has been disabled. Contact support if you think that is the case.