I've been unable to pair these devices, treo just doesn't recognize this headset, even using the wizard. Is this BT headset compatible with the treo?

(it works with my dell axim WM2003SE)

Speaking of that, I was trying to pair my Axim x50 with the treo, both devices recognize each other but according to the axim, the treo doesn't have any discoverable service.. How can I transfer files between them? (via OBEX I think?)