Distance between arduinos

Thank all of you for using your time helping ir understandig what i want to do,
I am posting because i have my problem solved, i don´t really know how this happen, but i think its because one of the pins of NRF24l01 was not making contact with the conector even i tested with a multimeter, the fact is when i moved a little the system start working.

I want to say that very grateful with your help.
Thank you all.