Is there any way to disable the "lock" function on the Find My iPhone app when trying to locate a MacBook?

My MacBook was stolen and I went through Find My iPhone app to try to locate it. I inadvertently pressed on the lock button and punched in my code. I know this doesn't allow for me to be able to locate my Macbook, so I want to know if there is a way to disable the "lock" function. Please advise. Thanks!