LDN - Luminis Developer Network

I attended GCF Connector training last year, but am only now getting a chance to implement it locally. So, over the last couple of days, I've gone through my training manual, at least twice.

To begin, I installed XAMPP and Squirrel Mail on a different server and ensured everything works properly there.

Then I began going through the training manual again.
I went page by page, and have triple checked myself on every step, but when I click on the link pointing to Squirrel Mail, I get the infamous:

You do not have permission to access this service.

I don't see anything in the logs, and I've looked at squirrel.xml, squirrel.properties, squirrel.configman, and es.systems.

http://[URL]/cpipconnector/squirrel/GetConfigVersion2 shows:

authenticate=http%3A%2F%2F[URL]%3A8008%2Fcpipconnector%2Fsquirrel%2FAuthenticate&authenticateOIDlist=1.3.6.1.4.1.4409.1.1.4.2&createonlogin=0&deauthenticate=http%3A%2F%2F[URL]%3A8008%2Fcpipconnector%2Fsquirrel%2FDeauthenticate&deauthenticateOIDlist=1.3.6.1.4.1.4409.1.1.6.1&lastactive=http%3A%2F%2F[URL]%3A8008%2Fcpipconnector%2Fsquirrel%2FLastActive&lastactiveOIDlist=1.3.6.1.4.1.4409.1.1.5.1&sessionPlaceHolder=sessionPlaceHolder&sendcpsession=false&sendtimeout=false&sendlogin=true&useSISCredentials=false&usePDSCredentials=false

And I'm unsure what to look at next. Any help would be appreciated.

Thanks!