Zcash server not verifying transactions

I am running zcash server Ubuntu 16.04 and it's been running for 1 day but there are not transactions occuring. I followed all the details on setting up the server from here: https://github.com/zcash/zcash/wiki/1.0-User-Guide
and from https://minezcash.com/how-to-mine-zcash-part-3/

Here is my zcash.conf file:
addnode=mainnet.z.cash
rpcuser=username
rpcpassword=G86NQknxuaIv1hPvHE1Ndg32RMvBvxt8LPuZ0xdDl9iV=
gen=1
genproclimit=4
equihashsolver=tromp

"version" : 1000150,
"protocolversion" : 170002,
"walletversion" : 60000,
"balance" : 0.00000000,
"blocks" : 0,
"timeoffset" : 0,
"connections" : 0,
"proxy" : "",
"difficulty" : 1.00000000,
"testnet" : false,
"keypoololdest" : 1478472137,
"keypoolsize" : 101,
"paytxfee" : 0.00000000,
"relayfee" : 0.00005000,
"errors" : ""

I am using 4 cores at 8GB ram on a virtual server.
Any ideas why I am not mining anything yet?

I have the same problem. Let me know if you've solved it please.