If you are using a course site on Blackboard for Summer 2012, please remember to set your Course Availability setting to Yes when you are ready for students to access your course site. All Bb course sites are automatically created with the Availability setting set to NO. This allows you to make changes/additions to your course site before students can access the site.
If you do no set your course site to Available, students won't be able to "see" your course listing on Bb and will not be able to access it. If you need help with changing this setting, check the link below for the helpdesk article detailing the steps to change this setting.