I am also recieving this problem.
I don't believe that it's a problem with there being too many people, but this is getting annoying. I've been getting 2002 errors each time I've tried to log into the Data Center.
I checked my connection and router and all come back positive. So that means the problem lies with YOU Square-Enix! Whatever you did to "fix" the problem with the NA/EU players that caused them to be "Unable to move to contents Worlds and then unable to log back in" has apparently caused further problems.