@anoob: I was talking about the calendarlist.xml file. It uses <active> and <inactive> for the list tags instead of <header> and <item>. Just names.
@Rainy: Some days ago, I add the task list and snapped it to the event list. But when the day changes, the task list keeps in place and the event list goes down (below the taskbar). Every day I need to re-arrange them. I don't know if this is the original behaviour or just something that happens. Using the event list alone works fine, and doing the same (with the same order) at the top of the screen works fine also.
Finally, I modify the sidebar to match what I want.