Gas leakage problem

Hi
We create an a gas leakage protect and control using arduino Uno and sim 900 GSM module but the GSM is connected to programmed arduino it not showing signals to remove arduino then the GSM shows signals
What is the problem?

RoshinR317:
not showing signals to remove arduino

To remove the Arduino from what?

Please post your program.

Also post a diagram showing how you have everything connected. See this Simple Image Guide

...R