错误:无法连接到任何指定的MySQL主机

当我尝试打开MySQL连接时，我得到以下错误;

MySql.Data.MySqlClient.MySqlException: Unable to connect to any of the specified MySQL hosts.
at MySql.Data.MySqlClient.NativeDriver.Open()
at MySql.Data.MySqlClient.Driver.Create(MySqlConnectionStringBuilder settings)
at MySql.Data.MySqlClient.MySqlPool.CreateNewPooledConnection()
at MySql.Data.MySqlClient.MySqlPool.GetPooledConnection()
at MySql.Data.MySqlClient.MySqlPool.TryToGetDriver()
at MySql.Data.MySqlClient.MySqlPool.GetConnection()
at MySql.Data.MySqlClient.MySqlConnection.Open()

*EDIT: *ConnectionString:

public string strProvider = "Server=00.00.00.00;Database=someDatabase;Uid=someUser;Pwd=somePassword";

我使用的代码:

string getCompany = "Select * From tbl_company";
MySqlConnection objMyCon = new MySqlConnection(strProvider);
objMyCon.Open();
MySqlCommand cmd = new MySqlCommand(getCompany, objMyCon);
DataTable dt = new DataTable();
MySqlDataAdapter da = new MySqlDataAdapter(cmd);
da.Fill(dt);
objMyCon.Close();

有什么问题吗?