DarkCoin uses port 9999 and the default rpcport=9332. So inside your darkcoin.conf file should look like this
rpcuser=user
rpcpassword=x
rpcallowip=127.0.0.1
rpcport=9332
daemon=1
server=1
Restart wallet after making changes to .conf file.
Then run your ccminer: ccminer35-50.exe --algo=x11 -o...