Dear guys,
I have some problems with the Transparency in the svg file.
I've just finished 1 of my artworks and I saved it in svg format so that I can serve it for web design. In this artwork, I did some Gradient and set the Screen mode in Transparency tab. Everything in Ai was fine, but when I opened the file with firefox (or even IE), the part that's supposed to be clear, was rendered in back.

I have 2 pics here. Just have a look and it'll be more obvious.

In Illustrator: http://ca4.upanh.com/12.330.16561152...llustrator.jpg
In firefox: http://ca7.upanh.com/12.330.16561151...einfirefox.jpg

Could anyone please explain why this happened? How can I solve this?
Thanks in advance!