I use nvoc for dual mining: DUAL_ETC_PASC

for ETC I can use only etc.nanopool.org or etc.ethermine.org servers, in all other ETC POOL servers I receive the message:

ETH: Authorization failed
: {"id":2,"jsonrpc":"2.0","result":null,"error":{"code":-1,"message":"Invalidlogin"}}
Stratum - reading socket failed, disconnect
ETH: Job timeout, disconnect, retry in 20 sec...

Please help me to find a solution.