i'm using an asus mother board of model - "P5RD1-VM".
i've created a bootable usb device with ubuntu 9.10. the problem is my pretty old system bought in 2005 whoz BIOS doesnot detect USB device and display it in the boot priority menu.
all i foud in the boot priority menu is-
hdd -hard disk drive
"no device " as third in the list.

please help me solve this problem.
thank you.