Exchange 2003 front end failed to access backend mailboxes

[ImtiazRahman]

Hi,

I am failed to connect to my backend exchange 2003 servers from my newly installed Front End server. When I open

https://my-front-end-ip/exchange,

and put user account/password, it is showing SSL error as follows,
####

The page must be viewed over a secure channel

The page you are trying to access is secured with Secure Sockets Layer (SSL).

#####

In fact, in the new Front End exchange server I have already installed and configured SSL (using local enterprise root CA). I also configure form-based authentication.
All the exchange 2003 are runing exchange 2003 SP2.

Please help.