I cannot see the attached files and I guess this is caused by the question marks in the files names. If the following information doesn't help you can you modify the names of the pictures and reattach them?
However, the IsRecentColorsActive property enables/disables the are with the recent colors. When we were designing this feature we wanted to look like the recent colors area in the Microsoft Word. Actually there are kept the recent custom colors, which means that if the selected color is contained in any of the color picker palettes (MainPalette, HeaderPalette or StandartPalette) it wont be added in the recent colors area.
Another thing you can keep in mind is that the recent colors wont be displayed if there is no colors inside of it. In order to display it you will need to define at least one custom color. In the demo the all the color pickers expect the first one have at least one item defined in the recent colors.
In addition you can take a look at the How to Use IsRecentColorsActive
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