Web name problem

I have set up web forwarding for www.elsterportal.co.uk to point to http://195.33.104.91/APPS/Web/WebPortal.nsf?Open

However, when i try to logon, it does nothing, it just loads the page again… but if i enter a wrong username or password, it comes back with a message, so the login form works A OK.

Now, if i type in http://195.33.104.91/APPS/Web/WebPortal.nsf?Open and log in, it works fine…

Problem 2…

I always have to use the ip address of the server 195.33.104.91 for links etc… i.e. “http://195.33.104.91/webuserauth.nsf/Administration?OpenForm”

if i try to use “http://www.elsterportal/webuserauth.nsf/Administration?OpenForm” it does not work…

Any Help would be great ?

Thanks Guys