update query in sql server with user session id

hi friends please solve this query:

i am add product in cart

it insert.

and when update my quantity it update

but i want when add repeat product then it return value=3;

in this procedure

insert and update proper work ;

but repeat return value =3 not working

Set @count=(Select COUNT(1) from dbo.MyCart where SessionId=@SessionId and Product_Fkid=@Product_Fkid)

if(@count=0)

begin

Insert into dbo.MyCart(SessionId,Product_Fkid,Qty,size_Fkid) values (@SessionId,@Product_Fkid,@Qty,@size_Fkid)

Set @ReturnValue=1

end

Set @count=(Select COUNT(*) from dbo.Tbl_MyCart where Qty=@Qty and Product_Fkid=@Product_Fkid) and SessionId=@SessionId

if (@count=1)

begin

Set @ReturnValue=3

end

else

begin

update dbo.Tbl_MyCart

Set Qty=@Qty

where SessionId=@SessionId and Product_Fkid=@Product_Fkid

Set @ReturnValue=2

end

return @ReturnValue