I need help

Hello,

I am from holland my english is not so good, so i hope you can understand me
and help me.

I make homepages with frontpage 2003, i have serverpack 1 for frontpage also
installed.

But now i am not going on the internet with Internet explorer but whit
FireFox and my homepages are not working right anny more.

Somebody told me that it comes becouse my html is not right, now i am trying
to make it right with the help on your site http://validator.w3.org/  but i
dont get it, i don't know were the troubel is, so i hope you can help me
with it.

http://www.vanbrienenoordschool.nl

http://www.heavenly-solutions.com


these sites i have make and the menu is not working and the sound is not
working.

can you help me please??

Johanna