NooB-Q

Hello community...
I have am trying to do something but am realy stuck, and I think it's just something that I miss.

I wrote this script, from the manual:

function Start ()
{
// Set all animations to loop
animation.wrapMode = WrapMode.Loop;
// except shooting
animation["grab"].wrapMode = WrapMode.Once;

// Put idle and walk into lower layers (The default layer is always 0)
// This will do two things
// - Since shoot and idle/walk are in different layers they will not affect
// each other's playback when calling CrossFade.
// - Since shoot is in a higher layer, the animation will replace idle/walk
// animations when faded in.
animation["grab"].layer = 1;

// Stop animations that are already playing
//(In case user forgot to disable play automatically)
animation.Stop();
}

function Update () {
// Based on the key that is pressed,
// play the walk animation or the idle animation
if (Mathf.Abs(Input.GetAxis("Vertical")) > 0.1)
animation.CrossFade("walk");


else
animation.CrossFade("idle0");

// Shoot
if (Input.GetButtonDown ("Fire1"))
animation.CrossFade("grab");
}

It relates to a character I imported with Maya. It grabs, it stands idly and it walks - but only Vertical (i.e W and S) when I want him to move sideways - it glides (!). I tried putting "Horizontal" to the input - and then it moves only horizontally - what's with that?