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http://www.ubuntu.com/products/WhatIsUbuntu/desktopedition says:

System requirements

Ubuntu is available for PC, 64-Bit PC and Intel-based Mac architectures.
At least 256 MB of RAM is required to run the alternate install CD
(384MB of RAM is required to use the live CD based installer). Install
requires at least 4 GB of disk space.

I guess you don't have enough RAM memory.

Good luck!

-Frans

It says "Enable javascript to use LMGTFY" in my firefox browser. If I
_allow_ javascript it works :)

-Frans

Hi Steven,

If I remember correctly you are able to connect to the internet (at least
with a browser, lets forget about email for now) when using a Live CD
with _every_ computer (that is able to run that Live CD) as long as you
connect an ethernet cable directly between that computer and the 'modem'.

Therefore I think the 'modem' is actually a router with a DHCP server
which gives the attached computer an IP address among other things,
allowing access to the internet.

If I remember correctly you used your router (the large box :) ) as a
'hub' .