C#.net mysql connection problem

I want to connect Remote MySQL dataase from C#.net but not connecting. always displaying message 

'Unable to connect to any of the specified MySQL hosts.'. 

How to fixed it. 

string ConnString = "SERVER=nepalidiary.com; Port=3306;DATABASE=bsslearn_db;UID='';PWD='abc';";
            string SQL = "Select * from tbl_StudentProfile";

            MySqlConnection cnn = new MySqlConnection();
            cnn.ConnectionString = ConnString;
            MySqlCommand cmd = cnn.CreateCommand();

            cnn.Open();

            cmd.ExecuteNonQuery();