Hi,
Need more info. Are you married in Law? as in do you have a marriage Certificate?
I believe you need to be married before your Spouse can apply for a Visa connected to your Visa.
Search CIC for Spousal Info and/or FAQ on Study Visa.
For some reason no links are allowed to be posted here.
Basically you have to be already married or probably get married in a Civil Sworn at the Marriage registry prior to applying for a Spouse connected to your application / Status but again this is not legal advice and I don't know much about your situation in one sentence posted.
I believe you can call the department and ask as well.