Quit wallet first
Delete all inside roaming/Mammothcoin folder exept wallet dat.
make a config file Mammothcoin.conf
start the wallet
...
Mammothcoin.conf
server=1
daemon=1
rpcuser=user
rpcpassword=pass
rpcport=11711
rpcconnect=127.0.0.1
addnode=112.90.37.158
addnode=113.120.251.137
addnode=84.112.231.34
addnode=157.61.209.92
addnode=14.162.145.203
addnode=37.59.19.89
addnode=203.74.150.28
addnode=182.173.123.181
How in the world you are miners, and never learn how to solve a little problem ?