Add remote subscriber SQL Server

I am getting this error:

SQL Server replication requires the actual server name to make a connection to the server. Specify the actual server name, 'Bla'. (Replication.Utilities)

I am aware of this:

http://www.cryer.co.uk/brian/sqlserver/replication_requires_actual_server_name.htm

and I have applied it. Unfortunately, the error persists. How can I add a remote subscribers with either an IP or DNS name?

PS:

This seems to help.