reverse proxy HTTP->HTTPS

[dm.dv@xxxxxxx]

Hi ALL!

Sorry for my silly question. I?m tying to set up NGINX as a reverse  
proxy to translate HTTP->HTTPS.
Frontend (NGINX) and Backend (Sun Webserver 7.0) are situated at  
different servers.
HTTP->HTTP work without any problem, but I cannot make works  
HTTP->HTTPS (if it is possible at all).
OS: sun solaris 10 (sparc). Could you please tell me what I?m doing WRONG.

Thank you for your help.
My configuration:
---------------------------------------
user  nginx;
worker_processes  2;

error_log  logs/error.log;
error_log  logs/error.log  notice;

pid        logs/nginx.pid;


events {
    worker_connections  256;
}


http {
    include       mime.types;
    default_type  application/octet-stream;

    log_format  main  '$remote_addr - $remote_user [$time_local] $request '
                      '"$status" $body_bytes_sent "$http_referer" '
                      '"$http_user_agent" "$http_x_forwarded_for"';

    access_log  logs/access.log  main;

    sendfile       on;
    tcp_nopush     on;

    keepalive_timeout  65;
    #gzip  on;

    server {
        listen       80;
        server_name  wm1.idc.eng.domain.ca;

        access_log  logs/wm1.access.log  main;
        error_log   logs/wm1.error.log   debug;

        location / {
                proxy_pass         https://wmail1.prod.domain.ca;
                proxy_redirect     default;

                proxy_set_header   Host             $host;
                proxy_set_header   X-Real-IP        $remote_addr;
                proxy_set_header   X-Forwarded-For   
$proxy_add_x_forwarded_for;
                client_max_body_size       10m;
                client_body_buffer_size    128k;

                client_body_temp_path      /var/nginx/client_body_temp;

                proxy_connect_timeout      90;
                proxy_send_timeout         90;
                proxy_read_timeout         90;
                #proxy_send_lowat           12000;

                proxy_buffer_size          4k;
                proxy_buffers              4 32k;
                proxy_busy_buffers_size    64k;
                proxy_temp_file_write_size 64k;

                proxy_temp_path            /var/nginx/proxy_temp;

            }

    }

}