Ass rejected and I'm not allowed to write exam

Please be advised initial due date of assignment was 11 Sep, notification was sent out regarding extension of assignment dates to Oct16, lecturers on discussion also conf extension dates. I however tried submitted my assignment on 19 Sept but received an error- Assignment rejected! Msg, you do not have examination admission.<br> Please assist as I only acted upon notification of extension . I'm so worried as the exam timetable stipulates \not allowed to write eng1502"<br> <br> Thanks<br> Resshni<br> ***"""