FIYAZALI,
Did your parents signed on the Birth certificate?
If your parents signed then it is should be ok.
But if there is no sign at all, it is nothing but a piece of paper.
Contact CIC and send an affidavit as early as possible.
There are some people in our forum sent additional documents and CIC has accepted during the course of initial processing.
However Birth Certificate is very critical for application, I would recommend you to go ahead apply a second application.
on the other hand, send an amendment to CIC including all the details.
Friends those whoever sent amendments to CIC at the time of processing application, can you please suggest "how to approach CIC and sent additional documents, so that they will add to file?"