Can't Scan from MF236n

Hello,

I can't scan using the buttons on the MF236n.  

I have gone into Scan Settings,  and entered shortcut key settings,register, scan >PC1.  Selected USB Connection, and B&W Scan.  

The screen "settings applied".  

However, when I go to scan, it says "select scan type", with computer listed below.  When I click on "computer" it says "connect the computer", which I have done.  And I can't get past that.

If I go into my printer settings on my Mac, I can activate the scan from there.

Printing is fine - I can print a document no problem.  It's just scanning which is giving me grief.  

I just set up the printer today, and downloaded the drivers from the Canon USA site.    I have restarted both my Mac and the printers.

Any suggestions?

Thank you!