I am not sure I understand you correctly. If you haven't created a group yet - You will need to create this usergroup on your own, and then supply Spam-O-Matc with the numerical ID of this usergroup so that Spam-O-Matic knows what group to put new users into.
Please read the first post of this thread carefully and verify you did everything in the same way. If you currently host your site with GlowHost, and still have questions - please, create a support ticket so we could assist you better. If you are not hosted with GlowHost I am afraid we can only offer limited support here in the forums.