Can't Run Kubuntu Jaunty

[Graham Todd]

I've downloaded Kubuntu 9.04 Jaunty a few times just to make sure I get
a good download, then burnt it to CD-R at various speeds.  I'm using a
Dell Dimension 4600 with (it tells me) 500kb of memory.

I have tried to load the live CDs once burnt and each one stops and
freezes at the loading screen in which four icons get loaded.  I must
emphasise that I don't even get as far as loading the "live" CD.

The disk drive has run Ubuntu and other Gnome-based distros, and even
installed one of them, so I don't think the problem lies there.#

Is the installer incompatible with Dell Dimension 4600 or is there
another reason I might not be able to load the "live" CD?

-- 

Graham Todd