C# Execute Store Procedure in SqlServer without parameters

Hi right no I have this method to execute the store procedure:

public static DataTable ExecuteProcedureNoParams(string connectionStringName, string procedureName)
    {
        using (DbCommand sprocCmd = SqlDB(connectionStringName).GetStoredProcCommand(procedureName))
        {
            DataTable dt = new DataTable();
            using (IDataReader sprocReader = SqlDB(connectionStringName).ExecuteReader(sprocCmd))
            {
                dt.Load(sprocReader);
                // DisplayRowValues(sprocReader);
            }

            return dt;

        }
    }

private static SqlDatabase sqlDB;

    public static SqlDatabase SqlDB(string connectionString)
    {
        if (sqlDB == null)
        {
            sqlDB = CreateConnection(connectionString);
        }
        return sqlDB;
    }

    private static SqlDatabase CreateConnection(string connectionString)
    {
        DatabaseProviderFactory factory = new DatabaseProviderFactory();

        if (string.IsNullOrWhiteSpace(connectionString))
        {
            // Create the default Database object from the factory.
            // The actual concrete type is determined by the configuration settings.
            return factory.CreateDefault() as SqlDatabase;
        }
        else
        {
            // Create a Database object from the factory using the connection string name.
            return factory.Create(connectionString) as SqlDatabase;
        }

    }

Now, the error that i'm getting is that it cannot find my store procedure. I tested the connection String in the web config and it also working properly.

it fails in the IDataReader call.

could please anyone help me with this issue?