Rackable Systems Server

I recently purchased a refurbished Rackable system COM10773
Dual Xeon 2.66Ghz, 2GB, 2 scsi x36GB, 2U Server

I am trying to load network software on it but am unsure how to access any external storage device.
There is no floppy so I plugged in a USB CD drive, with a boot CD but it failed to detect that.