The contribute connection I setup for my client doesn't work for him, but it does for me

Question

I setup a Contribute connection for a client (I have Mac OS X 10.4.11). I tested the connection in another computer (a mac on the same network) and it works just fine. However when my client launches the connection in his computer (a pc) it get this error:
"Contribute could not verify your connection key. A network connection to the server could not be establiched. Please contact your administrator for assistance".
I'm the administrator, but it's hard for me to troobleshoot him, becuase the connection works fine for me. He also got a second error message:
"Contribute could not connect because the server is down or not accepting connections. Please contact your administrator."
I told my client to wait and try again later (I have had to do that in the past when setting my own connections, sometimes it works right away, sometimes the server doesn't respond on the spot). However I would like to know if any body else have had these issues and if the problem could be a network connection, and internet connection a mac-pc incompatibility, or.. what else????
I appreciate any advice.
Thanks,
Adriana

Answer 1

Hi,
So this is a "real" AIM Name (Not an @mac.com or MobileMe valid AIM Name) ?
You can login on an older Mac  And presumably Here ?
If you Migrated a User to the new computer you may find you don't have permission to Write to the Keychain and that chaning the Passsowrd is not actually doing anything.
In Lion go to the Finder > GO Menu and hold th ALT key so you can select Library
In the Library open Keychains
Highlight the Login.keychain.
Do a Get Info (CMD (⌘) + i keys together).
At the bottom of the panel that shows should be Permissions and Ownership
Your Account's shortname should be in the list.
You should have Read and Write Permissions (you may need to click the Padlock)
With the padlock Unlocked also click the cogwheel type icon and see if you are listed as "Make (Shortname) the Owner" (it should be greyed out if you already Own the file).
In Applications/Utilities and opening Keychain Access should also list as many entries for the AIM name as you have changed the password for  (it creates a new entry rather than changing it)
Check that one of these does hold the right Password. (Delete the others if required)
I know that iCloud created @me.com names will only work in ichat 6 and the Messages Beta due to the way iChat 6 and above login to me.com and AIM so that AIM gets permission to read the password.
I have not heard of this issue the other way round.
10:14 PM      Monday; March 5, 2012
Please, if posting Logs, do not post any Log info after the line "Binary Images for iChat"
  iMac 2.5Ghz 5i 2011 (Lion 10.7.3)
 G4/1GhzDual MDD (Leopard 10.5.8)
 MacBookPro 2Gb (Snow Leopard 10.6.8)
 Mac OS X (10.6.8),
"Limit the Logs to the Bits above Binary Images."  No, Seriously