k2 issue (lightbox view) in IE and Firefox (need urgent help)

Hi,

I´m having a big problem with K2 products. The lightbox view does not change the size of the image to the parameters that i put in the parameter box of K2, but this only happens in IE and Firefox, because in opera, the lightbox appears with correct size.

Need urgent help.
Thanks

url of the site: http://www.copper-special-alambic.com