Cannot get database from domino server (from java application)

We have been trying to connect to a domino server from a java
application, and succeded in getting a valid Session object, but cannot
access any databases. Also the getting of the Session object is taking
unusually long (1-2 min). We have tried every server setting we knew
has something to do with connecting remote applications but nothing
seems to solve the problem. The strangest thing is, we don't get any
error messages, the connection just times out. We are quite clueless
now, about this problem, so we would appreciate any help.

Here is the java program we are testing the connection with, and it's
output:
(it's compiled with jdk 1.5)

import java.text.DateFormat;
import java.util.Date;
import lotus.domino.*;

public class Main extends NotesThread {
public static void main(String[] args) {
Main m = new Main();
m.start();
}

public void runNotes() throws NotesException {
try {
println("application started");

//get the ior file
String ior = NotesFactory.getIOR("praha.whitesoft.cz:63148");
println("got ior data");

//create the session
Session s =
NotesFactory.createSessionWithIOR(ior,"username","password");

//verify that session object contains real info
println("Platform = " + s.getPlatform());

//get database (it fails here)
Database db = s.getDatabase(null, "namesX.nsf");

//!App never gets here
System.out.println("got db " + db.getFileName());
} catch (Exception e) {
e.printStackTrace();
}
}

private void println(String str) {
System.out.println("["+getTime()+"]:" + str);
}

private String getTime() {
return DateFormat.getTimeInstance().format(new
Date(System.currentTimeMillis()));
}

}


[1:50:42 PM]:application started
[1:50:45 PM]:got ior data
[1:52:30 PM]latform = Windows/32
org.omg.CORBA.COMM_FAILURE: java.net.SocketException: Connection reset
by peer: connect Host: 192.168.2.145 Port: 63148 vmcid: 0x0 minor
code: 1 completed: No
at lotus.priv.CORBA.iiop.ConnectionTable.get(Unknown Source)
at lotus.priv.CORBA.iiop.ConnectionTable.get(Unknown Source)
at lotus.priv.CORBA.iiop.Generic.locate(Unknown Source)
at lotus.priv.CORBA.iiop.RepImpl.invokePreamble(Unknown Source)
at lotus.priv.CORBA.iiop.RepImpl.invoke(Unknown Source)
at lotus.priv.CORBA.portable.ObjectImpl._invoke(Unknown Source)
at lotus.domino.corba._ISessionStub.getDatabase(Unknown Source)
at lotus.domino.cso.Session.getDatabase(Unknown Source)
at lotus.domino.cso.Session.getDatabase(Unknown Source)
at connectiontest.Main.runNotes(Main.java:30)
at lotus.domino.NotesThread.run(Unknown Source)