Attempting to write a strafe function...

function mClass::onLevelLoaded(%this, %scenegraph)
{
$Player1 = %this;

moveMap.bindCmd(keyboard, "up", "mPlayerUp();", "mPlayerUpStop();");
moveMap.bindCmd(keyboard, "down", "mPlayerDown();", "mPlayerDownStop();");
moveMap.bindCmd(keyboard, "left", "mPlayerLeft();", "mPlayerLeftStop();");
moveMap.bindCmd(keyboard, "right", "mPlayerRight();", "mPlayerRightStop();");
moveMap.bindCmd(keyboard, "shift", "mPlayerStrafe();", "mPlayerStrafeStop();");
}

function mClass::updateFrame(%this, %frame)
{
$Player1.setFrame(%frame);
}

function mClass::updateMovement(%this)
{
if(%this.moveLeft)
{
if(!%this.strafe)
{
$Player1.updateFrame(2);
}
$Player1.setLinearVelocityX( -$Player1.hSpeed );
}

if(%this.moveRight)
{
if(!%this.strafe)
{
$Player1.updateFrame(3);
}
$Player1.setLinearVelocityX( $Player1.hSpeed );
}

if(%this.moveUp)
{
if(!%this.strafe)
{
$Player1.updateFrame(1);
}
$Player1.setLinearVelocityY( -$Player1.vSpeed );
}


if(%this.moveDown)
{
if(!%this.strafe)
{
$Player1.updateFrame(0);
}
$Player1.setLinearVelocityY( $Player1.vSpeed );
}


if(%this.moveLeft && %this.moveRight)
{
$Player1.setLinearVelocityX( 0 );
}


if(%this.moveUp && %this.moveDown)
{
$Player1.setLinearVelocityY( 0 );
}

if(!%this.moveLeft && !%this.moveRight)
{
$Player1.setLinearVelocityX( 0 );
}


if(!%this.moveUp && !%this.moveDown)
{
$Player1.setLinearVelocityY( 0 );
}
}

function mPlayerStrafe()
{
$Player1.strafe = true;
$Player1.updateMovement();
}

function mPlayerUp()
{
$Player1.moveUp = true;
$Player1.updateMovement();
}


function mPlayerDown()
{
$Player1.moveDown = true;
$Player1.updateMovement();
}


function mPlayerLeft()
{
$Player1.moveLeft = true;
$Player1.updateMovement();
}


function mPlayerRight()
{
$Player1.moveRight = true;
$Player1.updateMovement();
}

function mPlayerStrafeStop()
{
$Player1.strafe = false;
$Player1.updateMovement();

}

function mPlayerUpStop()
{
$Player1.moveUp = false;
$Player1.updateMovement();
}


function mPlayerDownStop()
{
$Player1.moveDown = false;
$Player1.updateMovement();
}

function mPlayerLeftStop()
{
$Player1.moveLeft = false;
$Player1.updateMovement();
}


function mPlayerRightStop()
{
$Player1.moveRight = false;
$Player1.updateMovement();
}

This is the code I've got going so far to make my sprite move up down left and right and face the proper direction and it works until I try and use the strafe key. It sets the sprite moving in a certain direction and it will continue to move after I release the directional key. But the frames continue to change no matter what.

Clearly I'm very new to TGB. I'm supposed to be helping program a game for my game II class but that in itself is a joke. I shouldn't be on the tech team to being with...

Any ideas and possibly an explanation with the correct code so that I might understand torquescript better and continue writing other functions?