Well i feel the most stupid guy in the world, my script works on linux and windows... on linux the problem is that i wasn't on the right WiFi.... So i couldn't reach up my virtualbox which was vulnerable to Shellshock for developing my tool... Now i'm on the correct WiFi and discovered a new injection with linux ...

Sorry for wasting your time.. :( So conclusion it works on both but i wasn't on the correct wifi to reach my virtualbox machine...