added button doesnt show in WEB when trial run

Dear there! I have added two buttons in one New_Edit page, but when trial run, they never show up while the original buttons(automatically created) are good. could anyone has idea about this?  have tried several times of re-trial run…. thanks!                                                        
1 answers

Have you set up permissions correctly for whatever those buttoms are pointing too? 9 times out of 10 a missing button is usually and permissions issue.