I tried the conf of the wallet:
server=1
listen=1
daemon=1
rpcuser=username
rpcpassword=password
rpcallowip=*.*.*.*
rpcport=3910
port=3919
addnode=173.44.63.199
and I put php blockchain on another server, but it cannot connect.
I don't think wildcards are allowed, try listing the IP address for the client. Also double-check the firewall and make sure it's open for the required ports.
Or just a single ip per line
If its based off an older version of bitcoin the asterisks is allowed although highly discouraged. Anyone can connect and attempt to brute force your credentials