Check this link out. Step 6 is likely the step you're missing (pull the lever forward)
https://support.usa.canon.com/kb/index?page=content&id=ART143852&actp=search&viewlocale=en_US&searchid=1510162194852
https://support.usa.canon.com/kb/index?page=content&id=ART143852&actp=search&viewlocale=en_US&searchid=1510162194852