Your browser is still resolving the old IP from DNS cache.
The new server is at 217.174.246.156, but your system is still using 209.42.17.176.
macOS: sudo dscacheutil -flushcache; sudo killall -HUP mDNSResponder
Windows (cmd as admin): ipconfig /flushdns
Chrome-only reset: go to chrome://net-internals/#dns and click "Clear host cache"
Then close this tab, reopen https://mcp.knoxed.com/, and you should land on the new server.
DNS TTL is 1h — this page will stop appearing for you once your cache expires or you flush it.