I designed a page, and i used the fancybox plugin, it works in all browser without to upload to the server, but when i upload the page on the server, the fancybox doesnt work in internet explorer, i have IE9. I used the development tools to debug the code of the page, and it marks an error:

SCRIPT438: Object doesn't support property or method 'Fancybox'.

Why does this happen?.

i would apreciate your helph, and excuse my english.