Export an animations as dae

[vasgat]

Hello to everyone,
I m new in Blender. I m actually now learning how to create basic shapes and animations. I have created a basic humanoid and I have added some bvh dancing moves data. I have exported my animation as dae but the problem is when I m trying to see it outside from blender or even when I m importing my dae again back to blender my humanoid and animation doesn’t look good. I assume I m missing something.
Thanks in advance for your help,
vasgat