I have only been using the bookport for a very short time, so I am truly a novice. I downloaded files in format four from audible. I thought that I had activated my bookport to Audible files. What do I need to do. I get an error which says something to the effect of aph format 4 files support? Gail Bryant Columbia Braille Teaching Services LLC 573 817-5993 1212 London Drive Columbia, MO 65203-2012 Provides quality braille and software instructional services to blind children/adults gbryant@xxxxxxxx -- No virus found in this outgoing message. Checked by AVG Anti-Virus. Version: 7.0.300 / Virus Database: 266.1.0 - Release Date: 2/18/2005