Like Statment Doesn't Work !!!

ALTER proc [dbo].[SP_Rprt_TempEmp]
@Temp_File_No int,
@Qualification int,
@Temp_Emp_Name nvarchar(200),
@Temp_BirthDate_From  date,
@Temp_BirthDate_To date,
@Temp_Dist int,
@Temp_Disabled  bit
as
begin


SELECT    dbo.Qualifications.Qualification, dbo.Temp_Emp.Temp_Emp_Name, dbo.Temp_Emp.Temp_File_No, dbo.Temp_Emp.Temp_BirthDate, 
                      dbo.Temp_Emp.Disabled, dbo.Temp_Emp.Temp_Job, dbo.Districts.District
FROM         dbo.Qualifications INNER JOIN
                      dbo.Temp_Emp ON dbo.Qualifications.Qualification_ID = dbo.Temp_Emp.Qualification_ID INNER JOIN
                      dbo.Districts ON dbo.Temp_Emp.District_ID = dbo.Districts.District_ID  

WHERE
( Temp_Emp.Temp_File_No=@Temp_File_No  or  @Temp_File_No=0 ) and
( Temp_Emp.Qualification_ID=@Qualification or @Qualification=0 ) and
( Temp_Emp.Temp_Emp_Name like N'%@Temp_Emp_Name%'  or @Temp_Emp_Name='null'  ) and

(( Temp_Emp.Temp_BirthDate>=@Temp_BirthDate_From and Temp_Emp.Temp_BirthDate<=@Temp_BirthDate_To )
OR (@Temp_BirthDate_From='1000/01/01' and @Temp_BirthDate_To='1000/01/01') )  and

( Temp_Emp.District_ID=@Temp_Dist or @Temp_Dist=0 ) and 
( Temp_Emp.[Disabled]=@Temp_Disabled )   


end