Servidor se cae 5 minutos! Ayudaa

[manuga93]

Mi web se cae cada dos por tres dejando este mensaje: (hosting24.com):

Website you were trying to visit was disabled for 5 minutes, because it received over 20% of total server requests.
It means that this website was using over 20% of processor resources, which is above allowed limit.
Website was temporary disabled to protect server from overloading and other websites on server.
Please try again in 5 minutes.

No se que es lo que falla. Pueden ayudarme?
Mi web es: www.redanun.es

Gracias de antemano