In year 1998 I and my wife became Canadian permanent residents, we were living Toronto. In year 2002 due to my mother ailing health and other family property ownership related issues we left Canada and came back to Pakistan. Since 2002 we are living in Pakistan, after long painstaking health related issues in year 2014 my mother passed away and between 2002 and 2015 most of our family property ownership issue settled as well. We traveled from Canada on our landing papers we never applied for PR card. Can we travel back to Canada using our landing papers or what are our options. Please advise.