Stored Procedure - Select LIKE

I have the stored procedure snipet below and it does not return anything.

What am I doing wrong here?  I works ok if I need all the records for the dataset and don't use the WHERE and LIKE.

CREATE PROCEDURE dbo.search

@Field      VARCHAR (20),   
@KeyWord      VARCHAR (200),  
@errCode          INT                 OUTPUT

AS
BEGIN

DECLARE @guid    uniqueidentifier
DECLARE @subject      NVARCHAR

SELECT  @guid = guid, @subject = subject
FROM myTable WHERE @Field LIKE @KeyWord

SELECT guid, subject
FROM myTable WHERE @Field LIKE @KeyWord

 

Thanks,

Zath