gsm 900 based led(p10)notice board

I am doing a project on printing gsm message on led dispaly.
I got the message printed on a single led disaply ,but when i tried using more than one dispaly
i am not even getting the gsm message on the serial monitor.

the image when display across is made 2 is attached

kindly help

the code i used is

sms11_.ino (2.6 KB)

hello sir, i am also need to display the text via gsm i cant receive message also on single p10 panel so please upload working code for single p10 panel