>On a network, when the second user logs on to my program, he or she gets the message "access denied". I've set the exe attribute to read-only. What else should I do?

A few things to try.
- put SET RESOURCE OFF in your CONFIG.FPW (or make foxuser.* readonly)
- make sure that you have SET EXCLUSIVE OFF (this needs to be set for again for each form with a private datasession)