Why is my canoscan 44oof scanning in negative mode

I solved this problem by the following:

Don't scan from the Canoscan toolbar. Use an imaging program (I used Picasa), import from the Canoscan, and Scangear opens up. In the settings for Scangear, you can choose positive or negative film (use positive for slides). You can keep using Scangear, or after using it once, you'll see it has corrected the problem with the toolbar