W2000 Com Ports

[lanceph]

I am running Win2000 and when installing a Palm through the Serial port it comes back and tells me that all 4 ports are used. Is there a way to tell what ports are being used by what? And/or is there a way to free one up so I can use one for the Palm?

This is a Dell latitude with an onboard Modem/NIC PCI where the Modem automatically takes com3.