Java Security

Hello to all.
I'm trying to build a simple client/server system wich uses SSLSocket to exchange data. (JavaSE 6)
The server must have it's own certificate, clients don't need one.

I started with this
http://java.sun.com/javase/6/docs/technotes/guides/security/jsse/JSSERefGuide.html#CreateKeystore
To generate key for the server and a self signed certificate.
To sum it up:

	Create a new keystore and self-signed certificate with corresponding public/private keys. 
keytool -genkeypair -alias mytest -keyalg RSA -validity 7 -keystore /scratch/stores/server.jks

	Export and examine the self-signed certificate.
keytool -export -alias mytest -keystore /scratch/stores/server.jks -rfc -file server.cer
 
	Import the certificate into a new truststore.
keytool -import -alias mytest -file server.cer -keystore /scratch/stores/client.jks

Then in my server code I do

System.setProperty("javax.net.ssl.keyStore", "/scratch/stores/server.jks");
System.setProperty("javax.net.ssl.keyStorePassword", "123456");

SSLServerSocketFactory sf = sslContext.getServerSocketFactory();
SSLServerSocket sslServerSocket = (SSLServerSocket)sf.createServerSocket( port );

Socket s = sslServerSocket.accept();

I am basically missing some point because I get a "javax.net.ssl.SSLException: No available certificate or key corresponds to the SSL cipher suites which are enabled." when I try to run the server.

Can it be a problem with the certificate? When using -validity <days> in keytool the certificate gets self-signed, so it should work if I'm not wrong.

I have also tried this solution

serverKeyStore = KeyStore.getInstance( "JKS" );
serverKeyStore.load( new FileInputStream("/scratch/stores/server.jks" ),
	"123456".toCharArray() );
tmf = TrustManagerFactory.getInstance( "SunX509" );
tmf.init( serverKeyStore );
			
sslContext = SSLContext.getInstance( "TLS" );
sslContext.init( null, tmf.getTrustManagers(),secureRandom );
			
SSLServerSocketFactory sf = sslContext.getServerSocketFactory();
SSLServerSocket ss = (SSLServerSocket)sf.createServerSocket( port );

and still it doesn't work.

So what am I missing?