[<font]You should be able to use both of your 24/96 and your Pod XT in WDM mode at the same time. Try changing your bit rate to 16 bit. If it works then your problem is the usb. IIRC, the Pod must be connected to a usb card with a VIA chipset to use both AIs at the same time. At least mine never worked together till I got a usb card with a VIA chipset.
Personally, I would connect the Pod into the 24/96. The 24/96 is a much better AI than the pod. Plus, the pod's modulation effects sound wierd when recording direct from it.