overlapping sound files

I have a file published in SCORM and im running it off of knowledge works LMS. When user is viewing the file, certain pages with multiple sound files are taking really long to load and once the page loads it is overlapping certain audio files. In Lectora I have it set up so a audio plays when a certain bulleted text shows. What am i doing wrong? Could it be a browser incompatibility? Im using IE6.I would appreciate a prompt response.Thanks!!!!