i have this error
Sorry, the database connection information used in the specified installation of SMF cannot access the installation of Invision Power Board 2.3. This may either mean that the installation doesn't exist, or that the MySQL account used does not have permissions to access it.
The error MySQL gave was: SELECT command denied to user 'base_smf1'@'localhost' for table 'ibf_members'
and y copy all db ipb to smf
You have to give the "base_smf1" database user permission to access the ipb database.
This can be done though phpmyadmin normally found in most hosting control panels.
but, i copy all database ibp to smf, or how base_smf can access to ipb?
You don't need to copy the database, if I understand you correctly.
It seems that on your installation, you have two databases, one for SMF and one for IPB. The SMF database has a user, "base_smf1". This user needs the rights to access and modify the database of IPB. You might be able to do that from your host's panel. Perhaps ask your host to do it?
Alternatively: you can also (re)install SMF in the same database as your IPB installation. That would work too.