What a monster!

A Jaycar MP3130 (mentioned here) is much better. It's a switchmode so much much smaller and cheaper ($32.95). I have 3 of these and a 2 drive (30+40GB) machine and they have worked faultlessly.

If you can, I'd take the DSE one back and get the MP3130. As long as you have the box and receipt, they should take it back (I worked at DSE for 4 years during uni)