Ahhh, I briefly wondered whether you were setting up the wireless device but using the content server. Glad you got it working.
The Content Server and Wireless Device connections are fundamentally different. The Wireless Device connection is used to connect to calibre as an e-reader "device" such as a kindle, a kobo, or an MTP device. Calibre can update metadata on a device, sending changes to books. The Content Server connects to calibre as a web (OPDS) client. This connection cannot automatically update metadata.
This FAQ might help explain the differences:
What are the differences between Content Server, Cloud, and Wireless Device connections?