I get the message:

Select a character from the list below to access the character manager.
To see your character on ROMDB, download the Curse Client.

I have already installed the client, so why doesnt it work? Please help

Do i have to be in us?

I believe this is the case.  Needs to be a US or at least an English speaking server.  Have a look at this thread. http://www.curse.com/forums/p/87689/441246.aspx#441246

I am in Govinda. But it does not show my characters... And i downloaded client too!

we are having some problems with the profile uploads recently, its on my todo to find out whats causing the problems