efcom sim 900 With Arduino mega 2560

Hello Guys i,ve efcom sim 900 like the one in this link
http://www.elecfreaks.com/wiki/index.php?title=EFCom_GPRS/GSM_Shield
And ARDUINO MEGA 2560
and i,m having problems in connecting them together ......... i,ve tried so many connections and each time i couldn't have any response
from the shield in the serial monitor
AnY suggestions please ...............................

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sorry.... i,m new here
can you help me in me question ?

I cannot. I am not familiar with any of the equipment you are trying to use.

I googled "Arduino GSM shield mega" and found a bunch of links, one of them is this:

// Per.