I need a recommendation for a converter that will allow me to throw a Mac G5 Server onto our Rackmounted PS/2 KVM (Rextron Novaview).  I've tried a ps2 to usb y adapter but it didnt have any active circuitry so was probably relying on the electronics in the keyboard itself so I guess no suprise it didnt work.

Can anyone recommend a product that will allow me to plug the ps2 ports from the kvm into the usb slots on the G5?

I tried a couple of keyboards including this one from the MS Basic set: http://www.c1com.co.nz/shop/step1.php?number=52