After installing QaSpace, there are basically two steps you need to make to be able to start using it.
Configure the plugin.
To enable QaSpace plugin for your current project go to Settings (you should have System Administrators global permissions).
Find "TEST MANAGEMENT" section in the left bottom corner.
Click on "QaSpace Enable" link, you'll be redirected to the separate page.
Press the "Enable" link and wait until enabling process is finished.