Hi,
I was not recommending one form of name over another.
The Original Poster was saying his Jabber ID and AIM name were working but his @Mac.com was not.
I was confirming that he did mean @Mac.com (And not MobileMe) and that his Password was short enough for the AIM servers.
For You if the password is no more than 16 characters then I would change the Login Port.
AIM and @Mac.com and MobileME names are all valid AIM Screen Names.
Go to iChat Menu > Preferences > Accounts.
In the accounts that Log in to AIM, deselect the "Use This Account" option to log out on the Account info tab on the right.
Then go to the Server Settings tab.
The text for the Port (5190) and th e server name should be dark (editable) text.
Change the port to 443 (in iChat 5 press enter to "Set" the Port"
GO back to the Account Info tab and reselect "Use this Account" to Log in.
This may happen because you have not set or allowed the ports iChat uses in your Router.
By default routers have the port open up to port 1024 so that Web Browsing and mail apps work out-of-the-box
Port 443 is below this threshold. It is also used by some Secure Web Sites (The Login here at Discussions and Banks and the like) and by some Mail servers.
The above may allow you to Log On.
If you cannot Send or Receive files or Video or Audio chat then you will have to sort your router out.
Some "Far Away" places can have their own problems. (once you get past the Login issue)
Mostly it is about the effective Bandwidth/Connection Speed that you may get.
The Middle East in general is one such area but still varies Country to Country.
9:08 PM Saturday; October 2, 2010
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