sql error: Can't read dir of './ohadalon_mdemo/' (errno: 20)

show tables from ohadalon_mdemo

Creating table authors from sql/authors.crtable.sql

sql error: Can't create table 'authors' (errno: 20)

CREATE TABLE `authors` (
`id` int(11) NOT NULL auto_increment,
`first` varchar(255) default NULL,
`last` varchar(255) default NULL,
PRIMARY KEY (`id`)
)

Loading authors from sql/authors.data.sql

sql error: Can't find file: './ohadalon_mdemo/authors.frm' (errno: 20)

INSERT INTO authors (id, first, last) VALUES (1,'Isaac','Asimov');

sql error: Can't find file: './ohadalon_mdemo/authors.frm' (errno: 20)

INSERT INTO authors (id, first, last) VALUES (2,'Robert ','Heinlein');

sql error: Can't find file: './ohadalon_mdemo/authors.frm' (errno: 20)

INSERT INTO authors (id, first, last) VALUES (3,'Stanisław','Lem');

sql error: Can't find file: './ohadalon_mdemo/authors.frm' (errno: 20)

INSERT INTO authors (id, first, last) VALUES (4,'Charles','Dickens');

sql error: Can't find file: './ohadalon_mdemo/authors.frm' (errno: 20)

INSERT INTO authors (id, first, last) VALUES (5,'J. R. R. ','Tolkien');

sql error: Can't find file: './ohadalon_mdemo/authors.frm' (errno: 20)

INSERT INTO authors (id, first, last) VALUES (6,'Roald','Dahl');

sql error: Can't find file: './ohadalon_mdemo/authors.frm' (errno: 20)

INSERT INTO authors (id, first, last) VALUES (7,'Douglas','Adams');

sql error: Can't find file: './ohadalon_mdemo/authors.frm' (errno: 20)

show columns from authors

No columns for authors

/home/ohadalon/public_html/M/Mtable.class.php:70: Mtable:__construct: authors: no auto_incrment column

sql error: Can't find file: './ohadalon_mdemo/authors.frm' (errno: 20)

show columns from authors

No columns for authors

sql error: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '' at line 1

select * from authors where id =