how to secure db written by asp ?

[info () biledge com]

hi,
we wrote db programs for our customer's secure online membership/career 
center/cv bank management system and put them into their server. 

i know that the server's password will be available for at least 7 people and i 
want to protect our db programs from lazy/easy-minded people -i dont mind if 
a professional takes and uses them- .

do you know a way to protect ? 
thank you and regards,
bilur