Please tell me correct settings for merged mining for DO Ubuntu 14.04 x64
My settings does not work properly:

sudo apt-get update
sudo apt-get install git make automake screen libcurl4-openssl-dev
git clone https://github.com/Lucasjones/cpuminer-multi
cd cpuminer-multi
./autogen.sh
./configure CFLAGS="-O3"
make
screen -S minerd ./minerd -a cryptonight -o http://fcn-duck.pool.minergate.com:5563 --user=mail@mail.com --pass=x -t 2