San Niki

Hello animation comunity! I started using Poser Pro 2012 to learn how to make some funny animations. I read "how to create animations" section on secondlife wiki and some basic tutorials, everything was going well but when I tryed to export my animation to BVH I got the following advice : "Cannot open bvh file for writting" and my animation didnt export :( So I cant export animations to BVH and dunno why, Please helpme! :( Replies would be very apreciated, thank you!