lightbox help please!!!?

[geth]

hello there

hopefully, someone can help me with this question???

ive followed the lightbox steps as posted here: http://www.dynamicdrive.com/dynamici...box2/index.htm

and for some reason, it only works in IE and not FF etc... my knowladge of web stuff isn't great at the moment as this is my first website: http://www.jacha.co.uk

does anyone know how i can make this work? this has been bothering me for a few days now

cheers