Some Problems in my forum

hi
i have some problem in my forums
1- I cant login to admin sometimes
2- browsing forums is slow with some members, in the same time it is fine with the others
3-Editing the treadrs is very slow
4-registration confirmation email doesnt go to nre subscribers and gets error
and if you want to see the problem try to regist in my forums and see what error you get
my forums URL is :
http://www.topuae.net/vb
Any one can solve it to me......!!! :cry:

[Gary King]

Maybe server problems, or caused by some hacks or modifications you installed to your vBulletin. You can try replacing all of your vBulletin files with a fresh copy of it from the members area at vB.com

[Erwin]

No one can solve it because we don't know what the problem is without having access to your server and files. It could be your server, or your forum files themselves.