The "link" isn't just for connection; it's for data flow. Always remember to click before trying to generate reports, or your reports will appear empty. Is it Time to Upgrade?
: For a modern walkthrough on configuring 2008-era ZK software with newer biometric devices, refer to the ZKTeco Installation & Configuration Guide Core Functionality Covered Device Connectivity : Using IP address and Port 4370 (default) to sync logs. Attendance Rules zk attendance management 2008 ver 3 link