Firewire. Not reading device.

Hello. I had a question as to how would you know if your firewire port is damaged (hardware) or if it is a software issue. I have a Apogee Duet that connects through firewire. The device lights up so I know there is power going to it, but once plugged in, my computer does not read it.
I have tried restarting and reinstalling the software but still no luck. Does anyone have any advice?
Thank you.
Also, I have read somewhere that you can reset a certain type of memory that is associated with firewire. What I took from the reading was to basically restart the computer. Anyone know?

USB and FireWire Quick Assist
http://support.apple.com/kb/HT1151?viewlocale=en_US
What to do if your computer won't recognize a FireWire device
http://docs.info.apple.com/article.html?artnum=88338
Dealing with FireWire problems (drives not mounting, devices unrecognized, etc.)
http://www.macfixit.com/article.php?story=20041221081432908
 Cheers, Tom

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