i want to passing a datatable (that have 20 rows) to my store procedure and use it's data in my store procedure?

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SQL-Server

SQL-Server-2008

i want to passing a datatable (that have 20 rows) to my store procedure and use it's data in my store procedure?
how can i do it?
i use
- ================================
-- Create User-defined Table Type
-- ================================
USE Test
GO

-- Create the data type
CREATE TYPE dbo.MyType AS TABLE
(
col1 int NOT NULL,
col2 varchar(20) NULL,
col3 datetime NULL,
PRIMARY KEY (col1)
)
GO
and pass below parameter to my store procedure but not work and get me error?

@tvpNewCategories dbo.MyType READONLY