I dont get the CPUminers (minerd) connected to the DO-Server (maxcoind)...  

maxcoin.conf:
...
# Enable RPC
server=1
daemon=1

# RPC information
rpcport=8669
rpcuser=
rpcpassword=
...

CPU-Miner:
./minerd -a keccak -o http://:8669 -u -p
[2014-02-06 22:41:18] HTTP request failed: couldn't connect to host
[2014-02-06 22:41:18] json_rpc_call failed, retry after 30 seconds
[2014-02-06 22:41:48] HTTP request failed: couldn't connect to host
[2014-02-06 22:41:48] json_rpc_call failed, retry after 30 seconds
...

Server is running and synced (blocks=227 and counting). What am I missing?!