problem activating plugin dash and others

Las night, i have a problems with your plugins, my site have been see too bad... i deactivate the plugins, now i want to activate dash and appears the leyend:
Fatal error: Allowed memory size of 134217728 bytes exhausted (tried to allocate 72 bytes) in /home/pasionxchiapas/public_html/wp-includes/compat.php on line 123

and brokes all my site, i deactivate the plugin and get back ok the site... but i can not work with your plugins, what happen?