Two Atmega´s, one with 8Mhz and one with 16Mhz

[Grave]

Hi,

I want to use the RFM69HCW. Therfore I have an Arduino Uno with 16Mhz clock and an Atmega328 on a Breadboard with 8Mhz. I uploaded the Node.ino and the gateway.ino.
But it dos not work.
When I open a serial Monitor on the gateway it comes "Listening at 868 Mhz... SPI Flash MEM not found (is chip soldered?)..."
When I plug in the Atmega with the Node.ino into power, this messages on the Gateway will repeat still I unplug the Atmega.
Is it possible, that the different clocks is the problem?

Thanks Grave