Well, I think that any of the 90,000 members would need a little bit more info...
1- Do you have a firewall running?
2- What are the errror messages in the log files when you try to access these directories? Look at both the error and acces logs!!!
3- When you say you have it "set-up", what exactly do you think you've done to "set-it-up"? Enabled, disabled what?
4- You've tried to access these directories from where? Your box, from another box, via a proxy...????
...just for starters....