SIM900 Problems - +CPIN: READY but no SMS


im trying to send a SMS with a SIM900 Modul.
It says RDY +CFUN: 1 +CPIN: READY.
I tried couple wirings and codes.

Attached the current one.

I read about the jumpers, could this be the problem? I tried to pull one out like in the article where i read about it but still no SMS.

Im not getting a response at all when i enter "s".