Time Machine Server - external firewire 800 RAID array incompatible??

Hi all
I originally posted in the wrong forum... so here I go again...
I have an XServe G5 connected to an 8TB RAID array via firewire 800 (running latest version of leopard server) purchased solely to act as a time machine server for a whole bunch of machines. A lot of money and resources went toward this as this is a vital part of our office. One of the machines is a completely decked out Mac Pro with 4x500GB Hard Drives striped for multimedia processing. (Thats why I need a HUGE backup partition on Time Machine)
Now, this was working for about 4 months. Some computers still see the backup array as a destination, but can't write to it, (just sit there for ever "preparing backup") and one machine successfully is still backing up to it.
But for the majority of the machines, when I try to set the Xserve external raid array as a Time Machine destination for the network, it comes up with a yellow "!" sign and "This disk drive may not support Time Machine over the network. Get more information about compatible drives" with a link that points here: http://docs.info.apple.com/article.html?artnum=306332
As you can see, that was completely not helpful, and now i'm wondering if I'll still have a job after the boss finds out I've just wasted his several thousands of dollars...
When selecting a backup destination for time machine backups, the array appears, but it always says "Failed" with an "i" next to Latest Backup in the system preferences, with the message "Backup volume cannot be found". Thats not true because i've so much as gone to the effort of actually mounting the dang drive in the finder... so its just not looking hard enough!
Here is some info about the external device:
It looks like a PC tower thing, with 8 firewire 800 ports on the back and 8 internal SATA slots. I purchased 8x1TB drives and inserted them in, and software partitioned them to create a giant striped drive (I understand that this might be a little unstable but its just a backup drive).
I daisy chained the firewire 800 ports on the back to output 2 cables, both going in the back of the xserve. Formatted fine, and works a treat. Except for the silly time machine thing....
I think what I am going to do is completely and utterly start again... go nuts one weekend and erase everything, every computer, every wireless router, everything, and start fresh. Since there have been so many little glitches here and there I just want them dead.
Well, if anyone has a quick fix, i'd appreciated it before the weekend

Hi everyone, Just thought I would give you all an update on how things went.
Lets just say that I got everything working fine... this is what I did.
1. I went through, completely un-raided and formatted the external 8 Bay firewire 800 drive
2. Completely reformatted XServe and reinstalled fresh (Probably not an option for a few, but I had a spare weekend)
3. Completely reformatted all client computers and reset all client accounts (Once again, probably not an option for most)
Essentially, I was starting out with a completely virgin setup and setting up for the first time. I installed the firewire 800 drives, and made them into a RAID again. Then installed Leopard server. Brought all the backed up files across, and when I plugged in the drive in Finder, it asked "Do you want to use this as a time machine backup" to which I said "Yes". It proceeded to create a backup.
When that finished, I went into server preferences, and selected the external as a time machine backup for the network. It worked...
I then went about everything like business as usual, and everything worked great. Still going... for now.
So thanks for all that helped, maybe try completely reinstalling everything and it may work.

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