Could be the location of the files on your hard drive.
Any Technic files that I want to copy to the SDCard Tool, I download to a "New Folder" in "My documents".
For me the The SDCard Tool has no problem reading and copying from this location. I use WinXP, so your system may be not work the same.
Good Luck,
Larry Hawk
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Larry "Hawk"
Hawk Music Sadly No More
♫ 🎹🎹 ♫ SX-900