buttons work but not when put with webpages

[sandwitch]

I’m hoping someone can help me with my site navigation buttons because I’m at a loss.

If I place my buttons on a clean white page, they work properly but on the website itself two of my buttons keep giving problems; which is why I’ve attached the whole dang xara website workfile (minus the fonts and downloads).

I’ve also included a second attachment that shows the buttons working as I want them to.

1) the home/index page button: when the home page is open, the “home” button is supposed to have a green background showing that that is the page you’re on. Every other button does this but the home button.

2) On page 5/9 (the children for life page) none of the buttons react as they should: you either can’t click on them at all or else you can activate the buttons by moving your mouse from the top of the page down towards the buttons and not from the middle of the page up which is what you normally do if you’re scrolling along a webpage.

Any ideas? Because I'm stumped.

website design:Church2.web (It's 6.45MB)
and button design: XARAbuttonhelp.web