If a particular course is not showing up in your course list on cuLearn, check your Carleton Central account to ensure you are fully registered in that course. In some cases, the course instructor may hide the course from view as they may be building the course content or may decide not to use cuLearn.
For the latter please consult with the course instructor.
If neither of these cases pertain to your situation, contact Computing and Communication Services (CCS) at (613) 520-3700 or email ccs_service_desk@carleton.ca.