Hi...I had asked that question yesterday! The answer lies here..right in your GUIDE..this is what it says
10. Indicate whether you are a citizen or a permanent resident of Canada. If you are a naturalized Canadian (i.e., you came to Canada as a permanent resident and were later granted Canadian citizenship), write the date you became a Canadian citizen. If you are a permanent resident, write the date you became a permanent resident of Canada. The date is found in Box 45 of your Immigrant Visa and Record of Landing (IMM 1000) or of your Confirmation of Permanent Residence (IMM 5292).
Indicate if you are a Canadian citizen and if your claim to citizenship is by descent (example: you were born outside Canada to a parent who was Canadian at the time of your birth or adopted outside Canada by a Canadian parent and obtained citizenship through he adoption provision of the Citizenship Act).
11. If you are a naturalized Canadian citizen and no longer have your Immigrant Visa and Record of Landing (IMM 1000) or Confirmation of Permanent Residence (IMM 5292), print the name you used at the time you became a permanent resident
SINCE U ARE A NATURALIZED CANADIAN and do not have your ROL or immigrant visa. YOU DO NOT NEED TO FILL IT IN!