Fire Wire 800 for Hard Drive - not work

I have a FW hub for FW 400.
Recently added new Formac Hard drive. When connected with FW 400 via the hub into the back of my G5 - works ok.
When I plug the FW 800 cable (that it came with) direct out of the other port on Hard Drive to the 800 port on the back of my mac - nothing.
What am I doing wrong?

Go direct to the FW800 port on your G5.
Also, you can't get FW800 performance if there is anything "upstream" in the chain that is FW400.
Only connect one cable to the FW800 port on the case.
The hub is going to keep everything connected to it as 400Mbps.
Keep it simple. I think you could be ocnfusing your system (and could damage the drive's directory) with it being connected to the 800-port AND a cable from the hub. Just use the native 800-port on G5.

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