Hello guys and girls I have a quick question I am tying to get this model not to float in the air when I press the forward key and use the mouse to pan up, how would I prevent this. Here is the code:

#define _MoveVec 14 /*14 to 16 ARE USED BE THIS SKILL*/

//This function gets the camera to follow the mouse movement and translate
//that into pan/tilt values, accordingly. It does NOT position the camera.
function FirstPersonCamera()
{
while(1)
{

camera.pan -= mouse_force.x * 12 * time_step;
camera.tilt += mouse_force.y * 12 * time_step;

if(camera.tilt > 60)
{
camera.tilt = 60;
}
else
{
if(camera.tilt < -60)
{
camera.tilt= -60;
}
}

wait(1);
}
}

action PlayerMove()
{


//camera made for the player
FirstPersonCamera();

player = my;
//player position on the ground
my.z = - 150;

var ForwardBack = 0;
var LeftRight = 0;
var groundDist = 0;

VECTOR temp;
VECTOR movement;
var anim_percent;

vec_set(movement, vector(0,0,0));


while(!my) wait(1);

while(1)
{


//Forward and back movement
if (key_w == 1) {ForwardBack = 1;}
if (key_s == 1) {ForwardBack = -1;}

if (key_a == 1) {LeftRight = 1;}
if (key_d == 1) {LeftRight = -1;}

if (key_w == 0 && key_s == 0) //No key pressed, clear the mp_move skills
{
ForwardBack = 0;
}
if (key_a == 0 && key_d == 0) //No key pressed, clear the mp_move skills
{
LeftRight = 0;
}

//Now perform local movement prediction
my.skill[_MoveVec] = ForwardBack * 15* time_step;
my.skill[_MoveVec+1] = LeftRight * 7 * time_step;
vec_set(movement, my.skill[_MoveVec]);

//Now move the player
c_move(my,movement,nullvector,IGNORE_PASSABLE | GLIDE | USE_BOX | USE_POLYGON);
vec_set(temp, my.x);
vec_sub(temp, vector(0,0,1000));
groundDist = c_trace(my.x,temp,IGNORE_ME | IGNORE_PASSABLE | USE_BOX | USE_POLYGON);
if ((groundDist > 500 ))
{
my.skill[_MoveVec+2] = -2 * time_step; //Modify Z

}


//Rotation: Player has exact same rotation function as camera. Should use c_rotate! NOTE FOR UPDATE!
my.pan = camera.pan;
my.tilt = camera.tilt;

//Update the camera position
vec_set(camera.x, my.x);

VECTOR Dir;
vec_for_angle(Dir, my.pan);
vec_scale(Dir, -1.7);
vec_add(camera.x, Dir);

//Animate. Not efficient, but hey, good for now...
if ((ForwardBack != 0))
{
anim_percent += 1.3*ForwardBack; // 1.3 = walk cycle percentage per quant
ent_animate(me,"walk",anim_percent,ANM_CYCLE); // play the "walk" animation
}
else // player stands still
{
anim_percent += 1*time_step;
ent_animate(me,"idle",anim_percent,ANM_CYCLE); // play the "stand" animation
}
wait(1);
}
}

Any help is appreciated.

Better use the "code" tag for scripts, otherwise they are hard to read here. When your model floats its position is probably set up wrong in MED, make sure that the origin is in the models center and not at its feet.