I've tried several times to load ubuntu onto a new usb 8gb flash drive. I d/l the desktop 11.04 desktop version of ubu. (http://www.ubuntu.com/download/ubuntu/download)
I then d/l the universal loader from pendrive and follow the instructions to create the bootable usb drive. Every time I get an error there is no operating system found. What am I missing?

Gateway MX7120
1.5 GB RAM
80GB HDD
Athlon 64 2.2GHz