my forum is kinda lagging...

i already disabled the avatar gallery... but it still does...

i have no clue what could be causing it

Link to your forum please. The Avatar Gallery would't make the forum lag.

there you go
http://onegai-hanashi.forumotion.net/forum.htm

I got no problem loading anything from your forum. Clean your cache.

it doesnt happen all the time...

but more or less occasionally...

Have you tried cheanging your broswer?

im using firefox...
the newest version of it...
and so far with the other forum im on ... and as well as on this one i dont have any lagging issue... now
(there was a lagging issue on an other forum some month ago... but thats the past... and it fixed itself)
but this forum is new... so.. i dont know

any ideas?

It can depend on a lot of things? everything from your browser,to your service provider,your system there's many things that can cause it.
the best thing to do is to keep everything updated with your system. clear all the cookies frequently and run your scans to make sure you don't have any adware,spy-ware,tracking cookies etc.. slowing your computer down

i think it's just a thing that will happen time to time. it happens to me once in a wile too and i have a very fast connection and new computer.