Touch 2D Object: Walk and Jump at the same time

Hi everyone,
I have a problem in my player: I can’t jump when I walk left or right.
I have 3 Sprite buttons (and i tested UI): Two for movement left and right, and one for jumping.
The problem is that i can’t walk and jump at the same time. I am sure that the code is correct and it’s working fin because: When i change the position of the jump button or even a left or right button in the center of the scene it’s working fine, and if i don’t place the three button all at the same Y position it works fine. (It’s a 2D game for android)

Thanks for your help.
Bye.

alt text

@soufianejad It seems to be happening only on some devices, samsung only as far as I know, try the game on another device. I didn’t find any workaround besides moving the buttons to where they work properly on all devices :S