Keyboard 8051 ASM help

Hello my friends, I'm doing a 8051 project using ASM language but I'm with issues in doing the software , i just want to press a number in the keyboard (4x3) and show it in the display (LM041L)
Actual hardware: http://imgur.com/cN9c1BE

I am never sure with Proteus keypad. They always had issues in their keypad models. Sometimes key once pressed is never released. Anyways, Did you take a look at Keypad tutorial?

Please post your code and Proteus file.