on screen joystick problem

When using the onscreen joystick on iOS devices i have noticed that i cannot using any other onscreen buttons. See below the code i use GUIButtons and below that the code for the onscreen joystick. Can someone please suggest a solution? i am not sure why when using the joystick the buttons do not register and touches.

/ GUI BUtton Code/

function Update() {
if(Input.touchCount > 0) { var touch: Touch = Input.touches[0];

      if(touch.phase == TouchPhase.Began && guiTexture.HitTest(touch.position))
      {
                   DoFunction();
             }
     }

}

/Joystick Code /

function Update() {
if ( !enumeratedJoysticks ) { // Collect all joysticks in the game, so we can relay finger latching messages joysticks = FindObjectsOfType( Joystick ); enumeratedJoysticks = true; }

 var count = Input.touchCount;
 
 // Adjust the tap time window while it still available
 if ( tapTimeWindow > 0 )
     tapTimeWindow -= Time.deltaTime;
 else
     tapCount = 0;
 
 if ( count == 0 )
     ResetJoystick();
 else
 {
     for(var i : int = 0;i < count; i++)
     {
         var touch : Touch = Input.GetTouch(i);            
         var guiTouchPos : Vector2 = touch.position - guiTouchOffset;
 
         var shouldLatchFinger = false;
         if ( touchPad )
         {                
             if ( touchZone.Contains( touch.position ) )
                 shouldLatchFinger = true;
         }
         else if ( gui.HitTest( touch.position ) )
         {
             shouldLatchFinger = true;
         }        
 
         // Latch the finger if this is a new touch
         if ( shouldLatchFinger && ( lastFingerId == -1 || lastFingerId != touch.fingerId ) )
         {
             
             if ( touchPad )
             {
                 gui.color.a = 0.15;
                 
                 lastFingerId = touch.fingerId;
                 fingerDownPos = touch.position;
                 fingerDownTime = Time.time;
             }
             
             lastFingerId = touch.fingerId;
             
             // Accumulate taps if it is within the time window
             if ( tapTimeWindow > 0 )
                 tapCount++;
             else
             {
                 tapCount = 1;
                 tapTimeWindow = tapTimeDelta;
             }
                                         
             // Tell other joysticks we've latched this finger
             for ( var j : Joystick in joysticks )
             {
                 if ( j != this )
                     j.LatchedFinger( touch.fingerId );
             }                        
         }                
 
         if ( lastFingerId == touch.fingerId )
         {    
             // Override the tap count with what the iPhone SDK reports if it is greater
             // This is a workaround, since the iPhone SDK does not currently track taps
             // for multiple touches
             if ( touch.tapCount > tapCount )
                 tapCount = touch.tapCount;
             
             if ( touchPad )
             {    
                 // For a touchpad, let's just set the position directly based on distance from initial touchdown
                 position.x = Mathf.Clamp( ( touch.position.x - fingerDownPos.x ) / ( touchZone.width / 2 ), -1, 1 );
                 position.y = Mathf.Clamp( ( touch.position.y - fingerDownPos.y ) / ( touchZone.height / 2 ), -1, 1 );
             }
             else
             {                    
                 // Change the location of the joystick graphic to match where the touch is
                 gui.pixelInset.x =  Mathf.Clamp( guiTouchPos.x, guiBoundary.min.x, guiBoundary.max.x );
                 gui.pixelInset.y =  Mathf.Clamp( guiTouchPos.y, guiBoundary.min.y, guiBoundary.max.y );        
             }
             
             if ( touch.phase == TouchPhase.Ended || touch.phase == TouchPhase.Canceled )
                 ResetJoystick();                    
         }            
     }
 }
 
 if ( !touchPad )
 {
     // Get a value between -1 and 1 based on the joystick graphic location
     position.x = ( gui.pixelInset.x + guiTouchOffset.x - guiCenter.x ) / guiTouchOffset.x;
     position.y = ( gui.pixelInset.y + guiTouchOffset.y - guiCenter.y ) / guiTouchOffset.y;
 }
 
 // Adjust for dead zone    
 var absoluteX = Mathf.Abs( position.x );
 var absoluteY = Mathf.Abs( position.y );
 
 if ( absoluteX < deadZone.x )
 {
     // Report the joystick as being at the center if it is within the dead zone
     position.x = 0;
 }
 else if ( normalize )
 {
     // Rescale the output after taking the dead zone into account
     position.x = Mathf.Sign( position.x ) * ( absoluteX - deadZone.x ) / ( 1 - deadZone.x );
 }
     
 if ( absoluteY < deadZone.y )
 {
     // Report the joystick as being at the center if it is within the dead zone
     position.y = 0;
 }
 else if ( normalize )
 {
     // Rescale the output after taking the dead zone into account
     position.y = Mathf.Sign( position.y ) * ( absoluteY - deadZone.y ) / ( 1 - deadZone.y );
 }

}