I am the beginner. I am getting this following exception at

binding.login("username", "passwordxxxxxx");

 nested exception is:
        java.net.ConnectException: Connection refused
16:45:08,771 ERROR [STDERR] AxisFault
 faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
 faultSubcode:
 faultString: java.net.ConnectException: Connection refused
 faultActor:
 faultNode:
 faultDetail:
        {http://xml.apache.org/axis/}stackTrace:java.net.ConnectException: Connection refused
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:333)
        at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:195)
        at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:182)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:366)
        at java.net.Socket.connect(Socket.java:516)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.connect(SSLSocketImpl.java:549)
        at com.sun.net.ssl.internal.ssl.SSLSocketImpl.<init>(SSLSocketImpl.java:351)
        at com.sun.net.ssl.internal.ssl.SSLSocketFactoryImpl.createSocket(SSLSocketFactoryImpl.java:69)
        at org.apache.axis.components.net.JSSESocketFactory.create(JSSESocketFactory.java:92)
        at org.apache.axis.transport.http.HTTPSender.getSocket(HTTPSender.java:191)
        at org.apache.axis.transport.http.HTTPSender.writeToSocket(HTTPSender.java:404)
        at org.apache.axis.transport.http.HTTPSender.invoke(HTTPSender.java:138)
        at org.apache.axis.strategies.InvocationStrategy.visit(InvocationStrategy.java:32)
        at org.apache.axis.SimpleChain.doVisiting(SimpleChain.java:118)
        at org.apache.axis.SimpleChain.invoke(SimpleChain.java:83)
        at org.apache.axis.client.AxisClient.invoke(AxisClient.java:165)
        at org.apache.axis.client.Call.invokeEngine(Call.java:2784)
        at org.apache.axis.client.Call.invoke(Call.java:2767)
        at org.apache.axis.client.Call.invoke(Call.java:2443)
        at org.apache.axis.client.Call.invoke(Call.java:2366)
        at org.apache.axis.client.Call.invoke(Call.java:1812)
        at com.sforce.soap.enterprise.SoapBindingStub.login(SoapBindingStub.java:2730)


Any help is appreciated.

Thanks,
Dinesh