Although certificate is install without error on Cpanel 11, when connecting to website, the following error occurred:
SSL received a record that exceeded the maximum permissible length.
This is a Firefox 3 specific error
This can occur if Cpanel 11 is not configured correctly to use SSL connection.
Check the following:
1) Correct certificate and private key pair are used. This solution will assist with checking the files: SO6759
2) Check that a dedicated IP is set, and the default port 443 is open for the website.