What happened to my fade in out tween

first of all this is my first ever website. its currently under construction and needs little tweaks here and there:


I have an embedded flash gallery that loads different XML content. achieved by pressing the three main buttons ‘projects’, ‘journals’ etc.

only projects and journal buttons are currently working. anyway when the gallery first loads my tweens between image changes work perfectly but when you click to view the next xml content ‘journal button’ it goes and there is no smoothness whats so ever.

i had an issue before, that when the journal button was clicked some of my previous xml data would still appear in my submenu. i managed to clear this with the unloadMovie. I cant see how this effects the tweens but it maybe the cause.

So is this the reason or is it something different? Any ideas would be brilliant. Thanks