Hi: OPF files need to be transferred through the BPT program, so that is what you're doing wrong. You can only copy unprotected MP3 files from a card reader. Pamela From: bookport-bounce@xxxxxxxxxxxxx [mailto:bookport-bounce@xxxxxxxxxxxxx] On Behalf Of Kent Keever Sent: Wednesday, April 08, 2009 9:26 PM To: bookport Subject: [bookport] card reader problem Hi Pamela and everyone, I am having problems with BT so I used my card reader and am having problems with it also. I tried sending only the OPF files and got an error message that said Playing unfiltered files not supported. Then I transferred all the files for each book and got the same message. What am I doing wrong? Can someone help me please? Thank you for your help. Kent