Drivers for the Apple External Modem in 10.5

Hi all! I recently upgraded my system with Leopard. All seems to be great save for the fact I can't use the external Apple USB modem attached to my Macbook Pro. While I don't fax that much I do sometimes have to use it to receive faxes and such from others. Is there a driver update for this for Leopard? Thanks to all in advance for the help!

Lance