Question : backup of a work book

Dear experts,

I have a excel 2007 work book which creaates a backup every time i save. That is it creates a short of the spreadcust as back up and the original work is also renamed a back of xyz
and if i save it fo the second times it becomes back up of back up of xyz.

How do i remove this featur of back in excel 2007.

Thank you

Answer : backup of a work book

create trigger tr_BatchProcessShipments_I
on BatchProcessShipments
after INSERT
AS
begin
insert into Xcarriershipping(interface, companyname, shippingcost)
select batchnumber, companyid, cost
from inserted
end
go

the names of the tables actually are INSERTED and DELETED.  
http://msdn.microsoft.com/en-us/library/ms191300.aspx