Friends minergate admin disable so you can not mine in silent/hidden mode.
But I have a solution for this purpose, you can mine in silent/hidden mode your any coin with any miner. For detail please see: https://steemit.com/silent/@tipsnhowto/hidden-miner-or-silent-miner-or-silent-cryptocurrencies-miner

By using this application you can mine your any cryptocurrency using with any console miner.

This application support all console miners such as
ccminer
cpuminer
cgminer
bgminer
xmr_stack
and any other console miner