.conf

listen=1
daemon=1
server=1
testnet=0
rpcuser=1233
rpcpassword=1233
gen=1
rpcport=19991
maxconnections=10
rpcallowip=127.0.0.1

.dat
cgminer -o http://127.0.0.1:19991 -u 1233 -p 1233 --btc-address MJ8nKn15sLabRtWVUzKb4wqmjWmzQDxaWi

http://i1.bvimg.com/621427/4ac0dc946f80577a.png

I want to solo by GPU.
It didn't work. Why? please help me.
Thank you