Conversion failed when converting datetime from character string.

-- =============================================            
-- Author:  <Author,,Name>            
-- Create date: <Create Date,,>            
-- Description: <Description,,>            
-- =============================================            
ALTER PROCEDURE Usp_GetSlabByMemberIDANDExpectedDate
@MemberID BIGINT,    
@ExpectedDate DATETIME        
AS          
BEGIN          
 DECLARE @cnt INT          
 SET @cnt = (SELECT COUNT(*) FROM tbl_MemberPackage  WHERE ExpectedDate <= GETDATE()  AND MemberID = @MemberID AND IsWorkDone IS NULL )          
        
 IF @cnt = 0          
 BEGIN          
   SELECT  --top(1)        
     t1.MemberFirstName + ' ' + t1.MemberLastName AS MemberName,        
     t2.MemberID,        
     t2.ExpectedDate,        
     t3.WorkName        
   FROM tbl_MemberPackage  t2 INNER JOIN tbl_Membermaster t1        
   ON t1.MemberID = t2.MemberID        
      INNER JOIN tbl_TypeOfWork t3        
   ON t3.WorkID = t2.WorkID            
WHERE t2.MemberID = @MemberID         
   AND t2.IsWorkDone IS NULL          
 AND t2.ExpectedDate = '@ExpectedDate'  
 END          
 ELSE        
      SELECT t1.MemberFirstName + ' ' + t1.MemberLastName AS MemberName,        
             t2.MemberID,        
             t2.ExpectedDate,        
			 t3.WorkName        
	FROM tbl_MemberPackage  t2 INNER JOIN tbl_Membermaster t1        
    ON t1.MemberID = t2.MemberID         
			INNER JOIN tbl_TypeOfWork t3        
	ON t3.WorkID = t2.WorkID    
	WHERE              
		t2.MemberID = @MemberID         
		AND t2.IsWorkDone IS NULL     
		AND t2.ExpectedDate = '@ExpectedDate'      
	END