Metadata setup looks okay.
Does the display in ProScan show the same as the scanner indicating that ProScan is communicating with the scanner?
I see at the very bottom of ProScan that the baud rate is 115200 so ProScan is using the comm. port and not the URL(Wi-Fi).
Do you want the Wi-Fi or Comm. Port method to communicate with the scanner?
{edit} You want to get ProScan communicating with the scanner first so do these steps.
1) Go to the Comm. Port menu
2) Select URL in the Port box
3) Click the URL Setup button
4) Click the Auto Detect IP Scanners button
5). See if the scanner shows in the list. If so then click the Set Selected... button