color suddenly disappeared on my entourage outlook for mac calendar

[debsc...@gmail.com]

Does anyone know how to get color coding for calendar events back for my entourage calendar for mac? I must have clicked on something because suddenly all of the color coding for every calendar entry is gone. When I try to get color back, the color choice (categorize) button only has 2 choices (edit categories, clear all). It is very hard to read my calendar when everything is white of the default very very pale blue.
Thanks