Hi. I am trying to install Lucid on my Laptop but can't get the live cd to boot correctly. At the moment, it's giving me a purple screen with a white logo at the bottom, then a black screen with the underscore character blinking, and then nothing.

(I have an HP tm2, with a USB DVD/CD drive. 64bit intel core 2 duo. I am using the Ubuntu 10.04 Desktop AMD64 .iso. I also tried the i386 .iso)