Canon PIXMA MX860 error message ScanGear

When I click on my Scanner (I put MP Navigator EX in my Dock), the application opens, but then a window opens that states:

ScanGear Searching for Scanners

Do you want the application "MP Navigator EX 2.1 app" to accept incoming connections?

I have to then click "Allow"

Setting can be changed in the Firewall panel of Security & Privacy preferences.

I have gone into the Firewall panel of Security & Privacy and added the scanner and the MP Navigator EX 2.1 app to allow incoming connections; I have also updated all software I could find relative to the Canon PIXMA MX860 on the Canon website.

But every time I try to use my scanner, I have to click on the "Allow" button, as if I never changed the settings int he Firewall panel.

It's not a big deal, just a nuisance to have to keep on clicking the Allow button every time I want to use the scanner. Any thoughts?