Error en la web!!!

Qué tal?
A partir de hoy apareció este error en mi web … mejor dicho en mi backend… no puedo acceder al gestor de articulos ni al de modulos

cuando voy al gestor de articulos me aparece esto:
500 – ¡Ha ocurrido un errror!

DB function failed with error number 1
Can’t create/write to file ‘/tmp/#sql_713_0.MYD’ (Errcode: 17) SQL=SELECT c.*, g.name AS groupname, cc.title AS name, u.name AS editor, f.content_id AS frontpage, s.title AS section_name, v.name AS author FROM y6z4i_content AS c LEFT JOIN y6z4i_categories AS cc ON cc.id = c.catid LEFT JOIN y6z4i_sections AS s ON s.id = c.sectionid LEFT JOIN y6z4i_groups AS g ON g.id = c.access LEFT JOIN y6z4i_users AS u ON u.id = c.checked_out LEFT JOIN y6z4i_users AS v ON v.id = c.created_by LEFT JOIN y6z4i_content_frontpage AS f ON f.content_id = c.id WHERE c.state != -2 ORDER BY section_name , section_name, cc.title, c.ordering LIMIT 0, 20

y luego si quiero ir al gestor de modulos me aparece esto:
DB function failed with error number 1
Can’t create/write to file ‘/tmp/#sql_713_0.MYD’ (Errcode: 17) SQL=SELECT m.*, u.name AS editor, g.name AS groupname, MIN(mm.menuid) AS pages FROM y6z4i_modules AS m LEFT JOIN y6z4i_users AS u ON u.id = m.checked_out LEFT JOIN y6z4i_groups AS g ON g.id = m.access LEFT JOIN y6z4i_modules_menu AS mm ON mm.moduleid = m.id WHERE m.client_id = 0 GROUP BY m.id ORDER BY m.position , m.ordering ASC LIMIT 0, 20

He visto algo por internet sobre permisos a la carpeta tmp pero nada.. le puse todos los permisos pero aun asi no puedo solucionar el problema

alguna idea???

Saludos y gracias de antemano