Sharing Broadband connection @ home?

I recently subscribed to Tiscali Braodband and wish to share this on my two machines at home. I have networked the machines together and I am able to share files etc. I followed the Windows XP ICS to try and share my broadband, I have allocated IP's etc and even disabled the firewall in an attempt to connect both machines to the Internet at the same time but to no avail???? Machine 1 which is directly connected the Internet works fine, Machine 2 can see the connection but will not display the pages? Both machines are using XP.