Brenda, There is a knowledge base article on OS X.2 and internal modem. Mac OS X 10.2: Modem Unable to Dial, "could not open the communications device" Alert Article ID: 106575 Created: 11/9/01 Modified:10/11/02 They don't list the cube as one of the effected models but they do the iMacs and it's basically the same modem. Hope that helps. Regards Frank