Done a new second project and the first goes off line

Hello
Now i created a second project with a second auth key.
The first is on Arduino uno Ethernet shield (ETH) and the new is on ESP8266 wifi (ESP)
After some minutes the ESP is online but the first ETH goes off line.
May be i cant’t keep two project on line on the same account?
Regards

Hello. You can. Probably issue with your sketch.