Follow this link, make sure you enter correct info:
https://services3.cic.gc.ca/ecas/security.do?app=ecas&lang=en
https://services3.cic.gc.ca/ecas/security.do?app=ecas&lang=en
I already tried that I always get this "We were not able to identify you using the information you provided. There could be three possible reasons:"
I saw some posts saying "eCAS" where can I check that?