Database error while enabling inferno shoutbox

Hey guys, i had inferno shoutbox installed a few months ago, and now i want reinstall it, i upload all the files downloaded fromhere(I'm on mybb 1.8) and everything is fine, but when i go to my acp, then on plugins and i click on 'Install and Activate' it throws me this error:



Anyone had this problem in the past?Any solutions?Thanks in advance