I'm trying of mine with the integrated miner, but never connects ...
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close copperlark
go to start
type %appdata%\copperlark and press enter
right button and new text file
rename it to copperlark.conf
edit it and add
addnode=95.120.120.194:10333
addnode=109.62.217.114:10333
addnode=94.237.222.80:10333
addnode=94.237.222.80:10333
addnode=83.220.236.230:1033
addnode=62.84.251.90:10333
addnode=212.178.28.108:10333
addnode=54.218.7.212:10333
addnode=88.85.192.136:10333
addnode=95.54.54.31:10333
addnode=77.108.222.40:10333
addnode=54.218.8.161:10333
addnode=83.220.238.120:10333
addnode=188.227.10.164:10333
addnode=46.72.79.35:10333
addnode=188.242.241.254:10333
addnode=178.126.253.84:10333
save it and open copperlark again