Realistic 7 RefContrrol

I dont kow whats wrong with burp i change my reffer to the fake admin url it never wiorks but the same thing when done with RefControl gives the correct page. Why is it so?? EDIT: I have logged in as PE teacher and when im trying to change PE grade from B to A and click on submit it just reloads and come to same page with grade still as B . I know im missing something, Pls drop some hints….

Although all of the teachers can login. you'll need to give them certain rights before they can change any grades, and they won't be doing it by clicking submit.

Find another way to send the data,  to where it's supposed to go.