I think cannot, because when the first time you let your son go, you already signed give up raise rights.
So obviously you already give up every rights link with canada.
It is sad but it is the truth.
dululu : 2009-02-26#4
回复: 前妻与儿子数年前移加,现在儿子是否可以申请生父来加团聚?
you should tell us detail, what you signed let your son come here.
because I know without your sign (totaly giveup) his monther cannot bring him here!