Tab Pages To Change Automatically

hi...

im trying to create like a test in access. this is the idea. the user open the first form to enter the info like student number, name and so on. when he clicks the button he goes to another form where is the first question. in the top part is the student number wich was obtained from the First form and an option group with the answers to the question of the label box. Also a timer was included so the form close after one minute using the form_timer event. everything seem to work fine but when i go to the table to see the answers of the student, it look like if the student took the test for the number of questions, in this case forms, so if there is 20 questions(forms) it appears 20 times under the same student number, cuz all the questions are in diferent forms. then i try to take out this line from the first form when the user click the button:

DOCMD.GOTORECORD,, aclast

when i take that line out it seem to work fine only that when the user click the cmd button it goes to the first record instead of the active student record.
So then i thought of tab pages making them not visible until the user click the cmd button. it work fine with the cmd button but how do i put a timer to all the tab pages so that when time expires the next tab appear??

is that a bit hard??/
any help would be appreciated, thanx