Could Not Bulk Insert. File ' @PathFileName ' Does Not Exist.

Someone help me out .How to solve the problem.I built a stored procedure in MS SQL 2005 to bulk insert into a table by reading the .txt file. But my stored procedure throws an error. "Could not bulk insert. File ' @PathFileName ' does not exist." My stored given below :- CREATE PROCEDURE [dbo].[ps_CSV_Import] AS DECLARE @PathFileName varchar(2000) ----Step 1: Build Valid BULK INSERT Statement DECLARE @SQL varchar(2000) SELECT @PathFileName="D:Areazone.txt" BEGIN SET @SQL = "BULK INSERT Temp FROM '"+" @PathFileName "+"' WITH (FIELDTERMINATOR = '"",""') " END --Step 2: Execute BULK INSERT statement EXEC (@SQL) --Step 3: INSERT data into final table INSERT mstArea(Description,Refid) SELECT SUBSTRING(Description,2,DATALENGTH(Description)-1), SUBSTRING(RefId,1,DATALENGTH(RefId)-0) FROM Temp --Step 4: Empty temporary table TRUNCATE TABLE Temp Please help me ,if someone have any solution