Animation Skipping Problems on player

We are developing FPS on-line game.
The players (first person, so the animation is limited to hands and weapon) animation keeps skipping at the same frame. The first person Animation is being cut off to 20~30% because of skipping problem.

Example) If a player tries to reload his weapon. The animation of the reload will be playing. But it skips few frames like it paused for a moment and he is done reloading after that moment.

1) The reload animation starts to play.

2) Take clip out of the gun................ And it stops!

3) After a short pause, the reload animation is ended and the player is full of bullets.

And if we try to reload again, it skips the same frame(same moment is being frozen)
It happens the same when we switch to different weapons.

I hope this is a clear example, because if I want to show you this in picture.
I would have to link a movie of it.