Forum suddenly slow/laggy

[trackchat]

I've been running vb3.6 for at least a year with zero problems. All of a sudden, it takes about 15~20 seconds to load every page. It's almost like it hangs for 15 seconds, then loads the page. The hosting company says nothing has changed on their side, however i know nothing has changed on my side either (in terms of changes/code anyway).

I am unsure what to try next, can someone give me some
pointers on how to debug this sort of issue?

You can see what i mean by going to this URL

http://trackchat.com.au/forum

or

http://trackchat.com.au/forum/sendmessage.php

It just hangs for 15~20 seconds, then loads the page.

It's driving me nuts. I realise i should probably upgrade, but i am perplexed as to why it would work fine all this time, then suddenly stop working.

TIA for any hints/tips/pointers.

--------------- Added [DATE]1313320317[/DATE] at [TIME]1313320317[/TIME] ---------------

scub my question; i simply updated all the old code files and it's working fine again. I think someone hacked the site a few weeks back (there were some suss files i had no idea what they were). All good now. Mods perhaps delete this thread.

[PAKIDIL]

why blocking guest for registration if you like to help and visit to your site to check or its just to increase registration users trick ?