SELECT command denied to user for database

I've created a database with the webfaction control panel and restored via sql script. When I tested my application i got this error:

SELECT command denied to user 'orinoquia_quizno'@'localhost' for table 'productos'

the select command i'm using is something like this:

SELECT
    `tbl1`.`producto_id`,
    `tbl1`.`producto_nombre`,
    `tbl1`.`producto_descripcion`,
    `tbl1`.`producto_prioridad`,
    `tbl1`.`categoria_id`,
    `tbl2`.`categoria_titulo`
    FROM `orinoqui_quiznos`.`productos` as tbl1
    INNER JOIN `categorias` as tbl2 on tbl1.`categoria_id` = tbl2.`categoria_id`
    WHERE tbl1.producto_id = {$_REQUEST["id"]};

The thing is when I make a simple SELECT (ie: SELECT * FROM producto) everything works fine, so I'm guessing is something that have to do with the INNER JOIN command.

When I tried to run the query in mysql Workbench it says:

Error Code: 1044
Access denied for user 'orinoquia\_quizno'@'localhost' to database 'orinoquia\_quizno'
GRANT ALL ON orinoquia_quizno.* TO orinoquia_quizno@localhost

but the user im using can't grant permissions on itself, how can I resolve this?