once you applied online you will received a letter regarding biometrics and once you need to visit VAC for biometrics
you need to take your passport and the letter which invites you for biometrics / thats it
just check my status and its says:
Visa application, tracking ID No.2014************* Your processed passport has been forwarded to the Canada Visa Offlice, ISLAMABAD on 24/06/2014. To know more, please call VAC helpline number or visit VAC website.
check this might help u out, nothing to worried about be confident, they usually dont ask these sort of question but they might do if they got suspicious
http://www.canadavisa.com/canada-immigration-discussion-board/my-experience-early-arrival-and-change-of-university-t228956.0.html
you should ask this before you applied 3rd time,
caips will help you understand the exact reason of refusal and you are able to focus on that particular point.