I would look at my IRQ's and determine if:
1)I have any left
2)my firewire was trying to share resources that 'don't share'. (eg: video, or Pinacle card)
start>programs>accessories>system tools>system information>resources>IRQ's
With the manufacturers turning out more 'feature filled' boards IRQ's are getting harder and harder to find. What you are looking for is a 'hardware conflict' rather than a 'software conflict'.