Clicking on multi GUI Textures on Android at the same time

Hi ,

I'm making a 2D platformer game and I put GUITextures as buttons on screen for input

Here's my script for the Right arrow GUITexture " To move the player to the right "

 var holding : boolean = false;
 var speed : float = 0;
 var speedincrease : float = 1;
 
 function OnMouseDrag () {
 
 holding = true;
 speed += speedincrease * Time.deltaTime;
 
 }
 function OnMouseUp () {
 
 holding = false;
 speed = 0;
 }

I attached this script to the GUITexture and it works fine

And this script is for the Jump GUITexture button

 var holding : boolean = false;
 
 function OnMouseDown () {
 holding = true;
 }
 function OnMouseUp () {
 
 holding = false;
 }

both scripts work fine , but when I click on the jump button while running , the player doesn't jump .. How Can I make the player able to press two buttons at the same time and make them both work ?

Thanks in advance ..