Hi trumanwu,
Very sorry we missed your post!
For Little Math, please clarify if you used the Auto Forward button, or the Override button. If you used the Auto Forward button, you may want to apply your auto forward settings in the Override Settings window and then turn Override ON -- this should apply your selected speed to all the lessons.
For Little Reader, if you are still using version 2, make sure you turned Override ON (there should be a green light in the Override button) so that your adjusted auto forward speed will be applied to all the lessons.
You may consider updating to Little Reader v3, especially the new curriculum. We adjusted most of the recordings in the updated curriculum content so the words now flash a bit faster than the v2 content.
If these suggestions don't help, please write to us at support[at]brillkids[dot]com with more details on the settings you did and how your lessons play back for you. Also, do attach a diagnostic report in case there are errors in your Little Reader or Little Math.
How to Create a Diagnostic Report
http://support.brillkids.com/entries/20438423-how-to-create-a-diagnostic-report-for-your-brillkids-learning-system