Dell Inspiron 530 / 10.5.7 Firewire issue

[530geek]

Hi, first post, please be easy on me. I have 10.5.7 running on a DELL Inspiron 530 (4GB RAM, Q9550 processor, bigger PSU, eVGA 8600GTS, Gigabit Ethernet PCI card and Rosewill 3-port Firewire card).

 

Used iAtkos 5i to install, updated to 10.5.7 with the combo updater. Everything is running great, but I have issues with my Firewire drive. I can mount it and see the top level files on it, but as soon as I copy or open a file, the Finder locks up. So I guess my Firewire is "half working". System Profiler shows 400mbps capability.

 

Any ideas???