Connection Failed, To A Server On My Network

Question

I have a Mac Mini that I use for backing up several other Macs on my network. The problem is, the only user that can log into the Mini, is the user name and password that is the owner of the Mini.
I connect to the Mini by: Finder > Go > Network
Then I select the Mini and choose Connect.
When I enter the user name and password of the main account on the Mini, it works just fine.
When I try to connect to the Mini with any of the other accounts I set up on the Mini, they all fail. The message I get is:
Connection Failed -5000
Any idea what I'm doing wrong?
G5 Dual 2.5 GHZ, 4.5 MB (cause WinXP Can't), GeForce 6800 Ultra, Sonnet SATA 4+4   Mac OS X (10.4.5)  

Answer 1

Here's how I moved the user directories:
Move User Folder:
sudo ditto -rsrcFork -V /Users /Volumes/SecondPartitionName/Users
Update NetInfo Manager:
/Volumes/SecondPartitionName/Users/
Delete Old User Directory:
sudo rm -dr /Users
Create Symbolic Link To New Directory:
sudo ln -s /Volumes/SecondPartitionName/Users /Users
When I mentioned that I had to "point" the system to the neew drive, I realized that I had forgotten to update NetInfo Manager with the new path name.
So, as I first mentioned, I did all the above steps when I first set up the system. However, then I added new users, who weren't in the user directory on the second partition. So, I deleted all the new users. Then added one back. I performed all the steps above, except I added the new user name after /Users. Such as:
sudo ditto -rsrcFork -V /Users/NewUser /Volumes/SecondPartitionName/Users/NewUser
This appears to be working. The new user can now log directly into the Mini. Also, the new user can log into the Mini over the network and the new user can see all the contents of their home directory.
In terms of the Second Partition:
Ingore ownership is NOT checked.
Owner is system.
Group is admin
Others is Read Only
However, I have a second, external drive that I partitioned for each user. I want each user to be able to access their own parition and use that to back up their files. I don't want the other users to have access to other users partitions. (except for the Mini's administrator). Unfortunatley, the only thing each user can access is their own Home directory. Only the Mini administrator can log into the Mini and have the option to mount any of the partitions.
Now each of the partions on the external driver DO have ignore ownership on this volume checked. Also, the owner for each external partition is the Mini administrator. Also the Group is the Mini administrator.
Should I assign ownership for each partition to each user?
Will the Mini administrator still be able to access all partitions?
Do I need to create some new groups to better manange this?
G5 Dual 2.5 GHZ, 4.5 MB (cause WinXP Can't), GeForce 6800 Ultra, Sonnet SATA 4+4 Mac OS X (10.4.4)
G5 Dual 2.5 GHZ, 4.5 MB (cause WinXP Can't), GeForce 6800 Ultra, Sonnet SATA 4+4 Mac OS X (10.4.4)