JSK KeyStore instantiation error

So here is my problem:

I try to create an SSLServerSocket using the function described below. It works perfectly under Windows (with NetBeans), but when I try to run it under Linux (it compiles, only doesn't run) I get
a java.security.KeyStoreException with the message: "JKS".

So I guess it must be having difficulties with instantiating the JKS KeyStore object, but I've got no idea why.
The jsse.jar is in my classpath and the key file is in the right place and accessible (it fails before even accessing it).


public SSLServerSocket getServer() throws Exception {

      KeyStore ks = KeyStore.getInstance("JKS");   // This line fails !

      ks.load(new FileInputStream(keystore), keystorepass);
      KeyManagerFactory kmf = KeyManagerFactory.getInstance("SunX509");
      kmf.init(ks, keypassword);
      SSLContext sslcontext = SSLContext.getInstance("SSLv3");
      sslcontext.init(kmf.getKeyManagers(), null, null);
      SSLServerSocketFactory ssf = sslcontext.getServerSocketFactory();
      SSLServerSocket serversocket = (SSLServerSocket) ssf.createServerSocket(2000);
      return serversocket;
}


Thanks for reading my problem and thinking about the solution!