This statement cannot be executed because you have not been granted DBA privilege for this database. Contact a person who has DBA privilege for the database and ask to be granted DBA privilege (or simply ask to have this statement executed for you).
It is also possible that you received this message because you tried to register a user-defined routine that is written in a language for which you do not have usage privilege. If you do not have usage privilege for the language, ask one of the following users to grant this privilege to you: user informix or another user who has been granted the privilege with the option to grant the privilege to other users.