Vivaty Studio doesn't export properly my x3d animation.

I've imported my x3d animation to "VS". I've done some changes in it. Then I saved it under some name. After this I have exported it to x3d or vrml and it seems to be not working properly. It meens that my avatar doesn't look like on an image. How do I solve this problem?? Send me please some step by step instruction how to fix this. I have Windows XP, Vivaty Studio Beta 1.0. Thanks and regards to you.