Thanks Plinkie ^^
I made what you said and it works, but what I want to do is a bit different. I want to display a custom message called by a variable.
1/- When my player collides with the computer, it becomes active.
2/- If the player presses A when it's active a message appears. On the computer with variable "message"=1, the messages displayed is the 1. If he collides with computer 2, it's the message 2 which appears.
Currently when the text field displays "1". What I would, it's displayed the message 1 "Il y à une trappe sous les arcs électriques." (sorry it's in french ^^)
Thanks a lot for your help