apache reverse proxy give me 404 error

[lavaz]

Hi!!!

I need to get working an apache2 as reverse proxy with a vendor's web page and it is not working. This is what happens:

I load the page through the reverse proxy and i can see: http://192.168.1.10/cgi-bin/design/html_template/login.html
2. Then i write user and password
3. I press the login button and i should see:
http://192.168.1.10/cgi-bin/design/html_template/login.cgi
http://192.168.1.10/cgi-bin/design/html_template/webviewer.cgi

but instead of that i see:

404 Not Found
The requested URL /error/HTTP_BAD_GATEWAY.html.var was not found on this server.

What is wrong?