Ok thank you very much!
You were right. Today my Caps came and now it's working perfect!

Hi,

i found this project about a year ago and bought some sensors etc.
This week I got some time and motivation, so I started playing around.
So I loaded the "SerialGateway" Example from the mysensors library on my arduino UNO and the "DimmableLight" Example on a fake Nano (first on a fake Mega, but the Mega threw the error message "failed init radio" or something like that).

My Problem:
I think they see each other, but the sensor node isn't registered by the gateway.
I use MYSController for testing. The Debug tab shows the following:

05.10.2015 19:21:59	STARTUP	Initialize message logging
05.10.2015 19:21:59	STARTUP	MYSController 0.1.2.282
05.10.2015 19:21:59	STARTUP	FPC 2.6.4 / Lazarus 1.4.2
05.10.2015 19:21:59	STARTUP	still under development :) tekka 2015
05.10.2015 19:21:59	STARTUP	Load INI file...
05.10.2015 19:21:59	STARTUP	INI version 0.1.2.282
05.10.2015 19:21:59	INFO	*** Logging START ***
05.10.2015 19:21:59	VERSION	MYSController 0.1.2.282
05.10.2015 19:21:59	STARTUP	INI file loaded
05.10.2015 19:21:59	STARTUP	Loading FW repository...
05.10.2015 19:21:59	REPO	FW "Blink" loaded. t=10, v=1, blocks=72, crc=0xD098
05.10.2015 19:21:59	REPO	FW "TimeReporter" loaded. t=20, v=1, blocks=840, crc=0x4AC5
05.10.2015 19:21:59	REPO	FW "Sensebender Micro" loaded. t=100, v=1, blocks=1344, crc=0x3482
05.10.2015 19:21:59	REPO	FW "Sensebender Blink" loaded. t=110, v=1, blocks=768, crc=0x1314
05.10.2015 19:21:59	REPO	FW repository loaded. Items=4
05.10.2015 19:21:59	STARTUP	Initialize message types
05.10.2015 19:21:59	NODE	New node discovered, node id=0
05.10.2015 19:21:59	NODE	New node discovered, node id=255
05.10.2015 19:22:08	UPDATE	4295098650
05.10.2015 19:22:16	INFO	Flushing FIFO
05.10.2015 19:22:16	INFO	Connected to COM3
05.10.2015 19:22:18	CHILD	New child discovered, node id=0, child id=0
05.10.2015 19:22:18	RX	0;0;3;0;9;gateway started, id=0, parent=0, distance=0
05.10.2015 19:22:18	RX	0;0;3;0;14;Gateway startup complete.
# HERE IS THE SENSOR NODE POWERED ON
05.10.2015 19:22:29	RX	0;0;3;0;9;read: 255-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0:
05.10.2015 19:22:30	RX	0;0;3;0;9;send: 0-0-255-255 s=255,c=3,t=8,pt=1,l=1,sg=0,st=bc:0
05.10.2015 19:22:31	RX	0;0;3;0;9;read: 255-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0:
05.10.2015 19:22:32	RX	0;0;3;0;9;send: 0-0-255-255 s=255,c=3,t=8,pt=1,l=1,sg=0,st=bc:0
05.10.2015 19:22:33	RX	0;0;3;0;9;read: 255-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0:
05.10.2015 19:22:34	RX	0;0;3;0;9;send: 0-0-255-255 s=255,c=3,t=8,pt=1,l=1,sg=0,st=bc:0
05.10.2015 19:22:35	RX	0;0;3;0;9;read: 255-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0:
05.10.2015 19:22:36	RX	0;0;3;0;9;send: 0-0-255-255 s=255,c=3,t=8,pt=1,l=1,sg=0,st=bc:0
05.10.2015 19:22:37	RX	0;0;3;0;9;read: 255-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0:
05.10.2015 19:22:38	RX	0;0;3;0;9;send: 0-0-255-255 s=255,c=3,t=8,pt=1,l=1,sg=0,st=bc:0

And the sensor node Serial output prints the following:

find parent
send: 255-255-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,st=bc:
sensor started, id=255, parent=255, distance=255
find parent
send: 255-255-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,st=bc:
find parent
send: 255-255-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,st=bc:
find parent
send: 255-255-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,st=bc:
Light state: OFF
find parent
send: 255-255-255-255 s=255,c=3,t=7,pt=0,l=0,sg=0,st=bc:
Node ready to receive messages...

I also tried this with the SerialGateway and Dimmer example from the mysensors website, but same failure.
I downloaded the library a few days ago so it should be everything the current version. Arduino IDE Version is: 1.6.5
I already tried different radios (also one with external antenna), all chips are marked with the + version, but RF24 library GettingStarted example doesn't show the +. I haven't added capacitors to the radios, but I think this problem is software sided because it looks to me like they find each other.

Any help appreciated

Greetings from Germany,
Johannes

PS: this project looks very cool and would be great if I get it to work.