Sqlstate[hy000] [2002]

When trying to install OJS 3.4 on myvala.com I get the following error message:
Une erreur de base de données est survenue : SQLSTATE[HY000] [2002] No such file or directory (SQL: create table journals (journal_id bigint not null auto_increment primary key, path varchar(32) not null, seq double(8, 2) not null default ‘0’ comment ‘Used to order lists of journals’, primary_locale varchar(14) not null, enabled smallint not null default ‘1’ comment ‘Controls whether or not the journal is considered "live" and will appear on the website. (Note that disabled journals may still be accessible, but only if the user knows the URL.)’, current_issue_id bigint null) default character set utf8 collate ‘utf8_general_ci’)
Please help me to solve the problem