I received two Terratec Producer Phase88 Rack PCI soundcards (Terratec Phase 88 Rack FW) from a friend of mine, who had been using them on his PC without any problems. I installed the PCI cards on my PowerMac G5 running on OS X 10.5.8 and installed the driver and control panel found on Terratec's FTP server and then connected the interfaces. The control panel however says no I/O board is connected and no audio seems to go in or out. When playing something on iTunes/VLC/QuickTime, the VU meters on control panels digital mixer are moving so the card itself should be working. I'm assuming the problem is not a physical thing since the cards worked perfectly on my friends PC. Terratec went out of business in 2012 so no help from them... Any help is truly appreciated!