You know where to find your Libertycoin folder in appdata/roaming?
If you got that, open your editor and copy this into it:
rpcuser=user5675675678576
rpcpassword=pass456456456
rpcallowip=127.0.0.1
port=55901
rpcport=55900
daemon=1
listen=
server=1
addnode=162.243.90.199
addnode=106.216.171.76

exactly like that. Then you name it Libertycoin. Just Libertycoin. Restart your wallet and it should work. Ah and type a few characters and numbers behind your user/pw...