mysql master master replication not working

[SoftDux]

Hi

Can someone please help me?

I have followed the mysql master-master replication howto, but it doesn't seem to work.

if I run the command "slave start;" I get the following error:

ERROR 1200 (HY000): The server is not configured as slave; fix in config file or
 with CHANGE MASTER TO
Empty set (0.00 sec)

Can someone please tell me where / how to set the slave?