I am not exactly sure but I did a google search for you try this fix
http://www.tech-recipes.com/mysql_tips762.html if you are not comfortable with editing mysql trying sending a support ticket to your host see if they will help ya.
If that doesn't work just trying searching " Can't connect to local MySQL server through socket " in google I found some nice stuff but that seemed to be the best so far. Sorry I can't be to much help
I know there are some hacks out there that access tons of pages on your server in attempt to bring it down for a few seconds. I had a guy try to do this to me he was successful till I blocked all ip's from accessing my server through putty.