PSE 9 (Win7) Organizer won't "copy" when adding images from network

Question

First, bringing images into PSE 9 Organizer works as expected from cameras, memory cards, etc. The file is copied from the original source onto the drive with the catalog.
But, I simply cannot get a file "copied" from its original location when bringing it into the PSE 9 catalog under Windows 7 (64-bit) if the source location is on another computer "seen" via Windows Homegroup network.
I do the following from the Organizer:
1) File-Get Photos and Videos-From Files and Folders
2) I browse to the Homegroup folder that has the file, and highlight it. (By the way, it takes several attempts of moving the mouse over the file name before the preview appears and the file is actually selected.)
3) At this point I would expect the "Copy Files on Import" option to be available, but it is greyed-out and not checkable.
4) If I select Open or Get Media, the file does go into the Organizer, but the file location is still the Homegroup network drive. As soon as the source computer is off-line, the Organizer link is lost, and I can't use the file.
Why is the "Copy Files on Import" option never available??
Here's what it looks like:

Answer 1

What I am trying to do is to use Organizer to centralize, on one hard drive, images from various other computers in my Windows 7 Homegroup that may or may not be on when I need the images. A thumbnail in the Organizer that points to an offline source is not terribly useful.
My problem could be fixed, as well as the overall usefulness of Organizer improved, by the simple enabling of the copy option even when another harddrive or network drive is the source. In this way, both the "always-on" and "never-on" situations could be accommodated.
My solution was to copy the files in question to an SD card, walk the card over to my main computer, and then bring them into the catalog (which actually copies the files to the hard drive, which was my objective in the first place).