Tiscali Broadbank & Netgear DG834G Router

I have Tiscali broadband and am using a Netgear DG834G router with built-in
modem to wirelessly send internet to my desktop. I am receiving a very good
signal strength of 54mbps however when I type in the default code to access
my router and set it up, I'm having no luck. It's just coming up with the
Internet Explorer "could not access site" page.

Any ideas? Somebody suggested I may need to telephone Tiscali as they may
need to clone my IP or something?