Maxtor 1394 external and sleep

The drive spins down nicely after the interval specified in the energy saver prefs, but spins up immediately after I put the computer to sleep and never spins down again.
Dave Devine wrote on :

I have an 80 GB Maxtor 1394 external storage device (the model without a power switch) attached to a Sawtooth upgraded with a gigadesign 1.4 GHz processor card. 10.3.7. The drive spins down nicely after the interval specified in the energy saver prefs, but spins up immediately after I put the computer to sleep and never spins down again. Any remedies?

Thanks in advance,

Dave