I recently got an Iomega 120 GB Firewire Portable HD. After I plugged it in to the Firewire port, I tried to import some photos off my camera. However, iPhoto will no longer find the camera. In addition, whenever I reboot my computer, it no longer finds the external HD. I have a 1.25 GHz PowerPC G4 Mac Mini with 512 MB DDR SDRAM, running Mac OS X Version 10.4.11. Any suggestions?