Actually, ImageMagick is still not installed...
I've looked under the "Show System Installed Modules" list in "Perl Modules" from CPanel, and there's no Image::Magick. There's Image::Size though, but no Image::Magick.
I've searched on the forum a bit, and I found out that I need root access to install Perl Modules, which I don't. Can someone install it for me?