Custom prop animation problem

[yeol2010]

Hello

I've made a custom prop with animations but have run into a problem, after compiling the model the animation in the half life model viewer comes out different to the animation in 3ds max, It like totally ignores the weighting I did and uses the default weights.

I'm wondering if all verts on a mesh have to be weighted to a bone ? also I didn't include a root bone could this be the cause of the problems ? any advice would be greatly appreciated.

Animation in 3ds max:
http://www.youtube.com/watch?v=ju0aOVI88g0
http://www.youtube.com/watch?v=bALgc5i0va0

Animation half life model viewer:
http://www.youtube.com/watch?v=iEpUAu_WKkg
http://www.youtube.com/watch?v=aXrx2EhFvYg