You may find that audio does not play for some videos in an Engage '09 interaction if both of the following criteria are true:
- The videos are in MP4 or FLV file format.
- There are more than 8 videos in the interaction.
This is a known issue. You can correct it by converting your movies to SWF file format. If you do not have a conversion tool that allows you to convert MP4 / FLV videos to SWF format, you might try a freeware program such as DVDVideoSoft's Video to Flash Converter.