Or is it one of those drives that wont like it !
It works when you use a Prolific 3507 chipset. See my link below, they also offer a Firewire/USB version.
Good article on this subject here:
I use THIS exact set-up (from this vendor), and I have had NO problems...
good link and point on firmware update
i have an a09 and the oem version of the belkin external case but its half belkin pricejust need to ework out what chipset it is