How can I get my guest VMs running with XenServer to have 32 bit color depth? The computer I'm on is at 32-bit. I RDP into a VM which is running XenCenter. I can't switch its color depth away from 16-bit, even though my RDP settings say 32-bit as the color depth from the session. From XenCenter on that VM I can go to the consoles of other VMs, but they can only be 16-bit or 24-bit.
EDIT: XenServer version 5.5.0, build date 2010-01-12, build number 25727p. I've installed XenServer tools on the VM in question.