[sql-server] Use stored procedure to insert some data into a table

I am trying to create stored procedure that inserts some data into my table, but I'm getting some errors like

Invalid Column name

For all the columns that I specified in my stored procedure. I have an IDENTITY COLUMN called ID which increments by one each time record is inserted. I also have some other columns in the table but they can be null. Here is my stored procedure and cannot figure out what I am doing wrong here.

USE MYDB
GO

SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO
CREATE PROCEDURE [dbo].[sp_Test]
  @myID bigInt,
  @myFirstName nvarchar(50)
  ,@myLastName nvarchar(50)
  ,@myAddress nvarchar(MAX)
   ,@myPort int

AS 
BEGIN 

 SET NOCOUNT ON; 

  BEGIN 

insert into MYDB.dbo.MainTable (MyID, MyFirstName, MyLastName, MyAddress, MyPort)
values(@myID, @myFirstName, @myLastName, @myAddress, @myPort)

  END 

END
GO

Here is the table definition:

USE [MYDB]
GO

/****** Object:  Table [dbo].[MainTable]    Script Date: 01/03/2013 11:17:17 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

CREATE TABLE [dbo].[MainTable](
    [ID] [bigint] IDENTITY(1,1) NOT NULL,
    [MyID] [bigint] NULL,
    [MyFirstName] [nvarchar](50) NULL,
    [MyLastName] [nvarchar](50) NULL,
    [MyAddress] [nvarchar](max) NULL,
    [MyPort] [int] NULL,
    [MyZipCode] [nchar](10) NULL,
    [CompName] [nvarchar](50) NULL
) ON [PRIMARY]

GO

if you want to populate a table in SQL SERVER you can use while statement as follows:

declare @llenandoTabla INT = 0;
while @llenandoTabla < 10000
begin
insert into employeestable // Name of my table
(ID, FIRSTNAME, LASTNAME, GENDER, SALARY) // Parameters of my table
VALUES 
(555, 'isaias', 'perez', 'male', '12220') //values
set @llenandoTabla = @llenandoTabla + 1;
end

Hope it helps.

If you are trying to return back the ID within the scope, using the SCOPE_IDENTITY() would be a better approach. I would not advice to use @@IDENTITY, as this can return any ID.

CREATE PROC [dbo].[sp_Test] (
  @myID int output,
  @myFirstName nvarchar(50),
  @myLastName nvarchar(50),
  @myAddress nvarchar(50),
  @myPort int
) AS
BEGIN
    INSERT INTO Dvds (myFirstName, myLastName, myAddress, myPort)
    VALUES (@myFirstName, @myLastName, @myAddress, @myPort);

    SET @myID = SCOPE_IDENTITY();
END
GO