Missing Captured Image's Icon

In Mac OS X 10.4.1, I've set Capture One PRO 3.7 to be a default application to download images from my Compact Flashes (shoot with Nikon D70) via the firewire reader. I also set the Capture Naming Preferences to 'Save icon for use in the Finder'. But in fact it appear to show only the general (Preview.app as default) icons instead, not the picture as I expected.

Although I could set the Finder itself to 'Show icon preview' when 'View as icon', but I prefer to view my Finder windows 'As column'.

Any suggestion would be glad.