Network error IOException when calling SQL from Applet

Think I am very close on my mission to have an applet accessing my SQL database !

My applet is called by this code...
<APPLET
  CODEBASE = "."
  CODE     = "app2.sqlapp.class"
  NAME     = "TestApplet"
  WIDTH    = 800
  HEIGHT   = 300
  HSPACE   = 0
  VSPACE   = 0
  ALIGN    = top
  archive  = "jtds-1.2.jar">
>
</APPLET>

The applet displays ok but gives this error message...
java.sql.SQLException: Network error IOException: Could not create socket

My sql code in the applet calling the sql statement is...
  public String getData() {
    Connection con = null;

    try {
      String driver = "net.sourceforge.jtds.jdbc.Driver";
      Class.forName(driver).newInstance();
    }
    catch( Exception e ) {
      System.out.println(e);
      return e+"";
    }
    try {
      con = DriverManager.getConnection("jdbc:jtds:sqlserver://DHSQL05:1433;user=user;password=passy");
      Statement select = con.createStatement();
      ResultSet result = select.executeQuery ("SELECT SALES FROM A_Digital_week_store WHERE (CST_CNTR_CD = 2409) AND (FNCL_END_YR = 2008) AND (FNCL_WK_NUM = 4)");
      result.next();
      String val = result.getString(1);
      return val;
    }
    catch( Exception e ) {
      e.printStackTrace();
      return e+"";
    }
    finally {
      if( con != null ) {
        try { con.close(); }
        catch( Exception e ) { e.printStackTrace(); }
      }
    }
  }
}

I have the driver jar file on the web server in the same folder as the java class.

Any tips to finish this off ?