FMS 2 gives Connection Problem

hi
I need to update a project that is already built in AS2.0 + FMS 2.0

I have my system with 1GB Ram, Windows Vista, AMD Athlon 1.9 GHZ Dual core.
I have also Xmapp as a web server on my system......

I have installed FMS 2.0 on My system.

now When I execute this code from Flash

client_nc = new NetConnection();
client_nc.onStatus = function(info) {
for (var prop in info) {
trace("\t"+prop+":\t"+info[prop]);
}
trace(" ");

};
client_nc.connect("rtmp://localhost/tutorial_sharedball");
//client_nc.connect("rtmp:/tutorial_sharedball/room_01/");

then it gives me this error:

level: error
code: NetConnection.Connect.Failed


Pls anybody help..................................
Thanks in advance