I listened to the Book Port for several hours last night, but when I tried to use it this morning, there was no response whatsoever. I took out and put back in the batteries to no avail, and then replaced the batteries with fresh alkalines, which also didn't help. Someone on this list suggested that leaving the batteries out for several hours might help, so that is what I am doing now. My Book Port failed earlier this year while installing beta software, and I dread the complications, costs and waiting involved if I have to send it back to APH for repairs the second time in six months. Peter