I have got a problem with animation in med , It was said in the manual that , for applying vertices to bones , select the bone , then select the vertices that you want to attach, then click the (apply vertices) botton , I did that right but the apply vertices botton is blocked (cant be clicked), whats wrong??

Maybe see if you are in animate mode... You can't try to attach vertices's while attempting to animate at the same time. I think that might be the problem... Last I remember you can't do that anyways.

I'm having this problem too, after a re-install of med. The apply button stays blocked no matter what I try I didn't have this problem working in previous versions...