My configuration is really not complicate:
mining_proxy.exe --host stratum.bitcoin.cz --port 3333 --getwork-port 8332 --stratum-port 3333
Also tried 50btc and btcguild no real difference.
tried also different but I really don't think it is the proxy.
Concerning the Long Polling. It starts with long polling then disables it then a little bit later it makes restart.
Can you tell me what is normal state of the Miner? LED OFF or LED RED ??
I wait for the 750 corsair PSU hope this can help or I have an expensive brick.
The real problem is the restart. Is there possibility to login to the device and see more info with USB or this other service port?
You have a network issue not PSU ! I had the same thing restarting every 2 minutes with long poll inactive, you have to see carefully that your cube is still changing pool (A to B, B to A) at every refresh...
Normal state is LED RED at start, then when you mine it will off & on...