Insert variable value into Sql server through android and JDBC

I can not insert values to my SQL server 2008 from my SQLite database.Here is my code which i tried with lots of examples,but it failed.

dd =MainActivity.this.openOrCreateDatabase("Sellapp", MODE_PRIVATE, null); 
                   Cursor crs = dd.rawQuery("SELECT * FROM customer", null);
                   while(crs.moveToNext()){
                          String uname = crs.getString(crs.getColumnIndex("id"));
                            String ucode= crs.getString(crs.getColumnIndex("cust_name"));
                            Log.v("executess", uname);
                            PreparedStatement stmt = connect.prepareStatement("insert into item_device (im_code, im_desc) values (?, ?");
                            stmt.setString(1, uname);
                            stmt.setString(2, ucode);
                            stmt.executeUpdate();
                            Log.v("EExecutess", ucode);

in the variables uname, u code i have my database values. when I am trying to list values from these variables I can do it without any error. But when I am trying To insert whole table to SQL server I could't do it.I tried examples from other questions but no one fits my problem.please anybody help. Thanks in advance..