if you are trying to login on port 2030 then you probably need to open it on your vps firewall 
also check that cwpsrv works
# netstat -tulpn|grep 2030
tcp        0      0 0.0.0.0:2030                0.0.0.0:*                   LISTEN      16070/cwpsrv 
it works if you get this output so then only firewall is left to be checked.