[hamidkh]

Originally Posted by EvilAkuma

It's giving you that error because your site has grown and your hosting package can't support that much resource.
You'll need to switch to a dedicated server.

Or probably someone has attempted a DDOS on your site which causes their CPU to exceed rapidly.

hello again;
I send your idea to my host server and they replay me there answer:

"
You are not under a ddos attack. The issue lies within vbulletins script. You will need to contact them to get either updated script or a newr version of the software. They can also offer you support to fix your issue.

Thanks,

"
My vB version is: 3.6.5
I removed All of add-ons except image hosting and color user and I removed style too.

I attach the my site log file and if you see it and show right way; I'll thank you very much.
I disabled my site for user and I am losing my users
Please Help me.

Thank you for yours co operations.
(Excuse me for my English)