I'm waiting for 2 nanos and 2 RF24 modules. I already own an Mega board.
I will try to understand why there are trouble with this board. Hope we will find the reason why it doen't works for the moment.
Best Regards
May be we have to consider the CSN (or SS) pin on the mega, that is the 53 pin.
Can you post the ref of the RF24 module you use ?
The 2 I will get are : http://www.satistronics.com/mini-24ghz-wireless-nrf24l01-nrf24l01-transceiver-module_p2450.html
There is alsa an CE pin that must be set or unset considering TX or RX according the doc. Isn't it ?