128 bit encryption is required in Internet Explorer (not firefox or other browsers). Please make sure it is enabled by doing the following:
You can get to the "enable protected mode" checkbox in Internet Explorer 8 by:
Open Internet Explorer
Click Tools
Click Internet Options
Click the Security tab
The check box will be under the slider for the level of security
Note: If you have a website as "Trusted" then you have to enable protected mode for trusted sites as well if you want them to be encrypted.