Help with CASE and LIKE

Hello guys! i'm having problem with my stored procedure..can anybody please help me.
I have a stored procedure below that is successfully executed/saved/"Compiled"(whatever you called it) but when I try to use it by supplying value to its paramaters it throws an error (Please see the error message below). I suspected that the error occurs from line with the Bold Letters becuase "@.SeacrhArg" variable is of type varchar while columns "Transac.Item_ID" and "Transac.Item_TransTicketNo" is of type Int. What you think guys?

ERROR:

Msg 245, Level 16, State 1, Procedure sp_Transaction_Search, Line 9
Syntax error converting the varchar value 'Manlagnit' to a column of data type int.



STORED PROCEDURE:

USE [RuslinCellPawnShoppeDB]
GO
/****** Object: StoredProcedure [dbo].[sp_Transaction_Search] Script Date: 09/04/2007 08:48:38 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER PROCEDURE [dbo].[sp_Transaction_Search]
@.SeacrhArg varchar(20),
@.SearchBy varchar(20),
@.TransType varchar(20),
@.FromDate datetime,
@.Todate datetime
AS
BEGIN
SELECT Customer.Customer_LastName,Customer.Customer_Middl eInitial, Customer.Customer_FirstName, Customer.Customer_Address,
Items.Item_Description,Items.Item_Principal, Transac.ItemTrans_Date_Granted, Transac.ItemTrans_DateCreated,
Transac.ItemTrans_Status, Transac.Item_ID,Transac.Item_TransID,Transac.Item_ TransTicketNo


FROM RCPS_TF_ItemTransaction Transac
INNER JOIN RCPS_Customer Customer
ON Transac.CustomerID = Customer.CustomerID
INNER JOIN RCPS_Items Items
ON Items.ItemID = Transac.Item_ID

WHERE
CASE
WHEN @.SearchBy = 'FirstName' THEN Customer.Customer_FirstName
WHEN @.SearchBy = 'LastName' THEN Customer.Customer_LastName
WHEN @.SearchBy = 'Item ID' THEN Transac.Item_ID
WHEN @.SearchBy = 'Ticket No' THEN Transac.Item_TransTicketNo
END
LIKE @.SeacrhArg AND

Transac.ItemTrans_DateCreated BETWEEN @.FromDate AND dateadd(day,1,@.Todate) AND
(
(@.TransType = 'Pawned' AND Transac.ItemTrans_Status = 1) OR
(@.TransType = 'Renewed' AND Transac.ItemTrans_Status = 2) OR
(@.TransType = 'Redeemed' AND Transac.ItemTrans_Status = 3) OR
(@.TransType = 'Sold' AND Transac.ItemTrans_Status = 5)
)
END

CALL STORED PROCEDURE

USE [RuslinCellPawnShoppeDB]
GO

DECLARE @.return_value int

EXEC @.return_value = [dbo].[sp_Transaction_Search]
@.SeacrhArg = '%man%',
@.SearchBy = 'LastName',
@.TransType = 'Pawned',
@.FromDate = N'9/01/2007 12:00:00 AM',
@.Todate = N'9/6/2007 12:00:00 AM'

SELECT 'Return Value' = @.return_value

GOI suspect Transac.ItemTrans_Status is a varchar and that is where the problem is|||WHERE CASE
WHEN @.SearchBy = 'FirstName' AND Customer.Customer_FirstName LIKE @.SeacrhArg THEN 1
WHEN @.SearchBy = 'LastName' THEN Customer.Customer_LastName LIKE @.SeacrhArg THEN 1
WHEN @.SearchBy = 'Item ID' THEN CONVERT(VARCHAR, Transac.Item_ID) LIKE @.SeacrhArg THEN 1
WHEN @.SearchBy = 'Ticket No' THEN CONVERT(VARCHAR, Transac.Item_TransTicketNo) LIKE @.SeacrhArg THEN 1
ELSE 0
END = 1
AND Transac.ItemTrans_DateCreated >= @.FromDate
AND Transac.ItemTrans_DateCreated < DATEADD(DAY, 1, @.Todate)
AND 1 = CASE
WHEN @.TransType = 'Pawned' AND Transac.ItemTrans_Status = 1 THEN 1
WHEN @.TransType = 'Renewed' AND Transac.ItemTrans_Status = 2 THEN 1
WHEN @.TransType = 'Redeemed' AND Transac.ItemTrans_Status = 3 THEN 1
WHEN @.TransType = 'Sold' AND Transac.ItemTrans_Status = 5 THEN 1
ELSE 0
END|||Thanks a loT Peso..But I preferred to use BETWEEN..AND.. for date unless you have there agood reason to use the <>= sign..But anyway thanks alot!|||if you use BETWEEN, you inadvertently get too may records.

BETWEEN '20070101' AND '20071231' will NOT get the records dated "20071231 10:14:23"

BETWEEN '20070101' AND '20080101' will get the records dated "20071231 10:14:23" but ALSO the records dated "20080101 00:00:00".

>= '20070101' <'20080101' will get the records dated "20071231 10:14:23" but NOT the records dated "20080101 00:00:00".