New Clients not appearing in SEPM.

I have a small problem that I need a bit of assistance with. I have Symantec Endpoint Protection Manager Running. It's on the latest version, and all of my existing clients are up to date. I am able to create new deployment packages in the form of executable files that I have installed onto new PCs that have come in. SEP installs just fine, and is able to communicate with SEPM and successfully update it's content no problem.

However, the issue at hand is that none of the new clients ever appear in any of the Groups in the "Clients" tab.

Any ideas on how I can get these machines to automaticly register?

Thanks in advance!