Hi there. I'm just encountered a problem. When i use my fire wire ports 400 and 800 simultaneously, and when i run certain programmes, my MBP would crash and prompt for me to hold down my power button to restart. I use my MBP to do audio work. I have an audio interface connected to my 400 port and a 750GB Western Digital My Book Studio ext HDD attached to my firewire 800. I also do have a USB Seagate Ext. HDD attached to one of my USB ports. The other port is used for a USB iLok Key. When i start up my Pro Tools software with all the hardware above connected, the MBP would crash and prompt for a restart. Same goes for launching Logic Express 8. I'm using Mac OS X 10.4.11. Anyone knows why is this so?