gsm shield not working about gsm-shield-arduino HOT 6 CLOSED

Does it work fine without it ?

my project is like when i send sms "pompeon" led turn on and when i send sms  
"pompeoff" led turn off this part work fine, but when i connect pir sensor with 
gsm shield when i turn on gsm shield it turn on for few seconds then turn off 
only when connect pirsensor i have also used adaptor 12v 1amp but same 
problem....

If you run the sketch without PIR, check that it works fine and then you 
connect the PIR. If the shield shut down can be an ampere problem. Does Arduino 
still work after the shield power-off? Can be a problem of PIR?

when i run sketch without PIR shield work fine but when i connect pir with 
shield it shutdown after few seconds.
The problem is that if i put code only for PIR like when sesnor detect anything 
led turn on shield work fine, but when i put code of sms automation and pir 
together then shield shut down and if i put code only for sms automation shield 
work fine.

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