Try not to direct link an animation.
The movement is fine over-all, but I'm not a big fan of the draw back the stick makes every second.
keep the torso in the same general area to avoid this. the positioning of the feet should make it rise and fall, creating the "bouncing" effect you might be looking for.

So mean Xero,
anyway yeah you need a lot of work on that run, it's quite jumpy and unrealistic, keep practising.

Dude this is really good for a first try.

A good way to help visualize a run is to do it yourself lol.(believe it or not)
and the back should be more arched and the arms should be closer to the body.
Also try to make the animation blend more into the first frame.

It helps to close a loop by trying to add the first frame to the end frame and then adding inbetweens to connect the joints. If the difference between your first frame and last frame is too big, just redo some of the frames to make it seem more naturally. This way, you won't get that skippy look and it'll be easier not to have things jumping around, like the torso.

Thanks guys this is my first try in flash (of coarse)

It feels really.. dry? Is this done with tweens?