I have installed Windows XP SP3 on my computer. I have installed Thunderbird 9.0.1 and Lightning 1.1 on it. whenever I launch Lightning the calendar tab is coming up and it was displaying empty grid . there was no entry for Day/Week/Multiweek/Month tabs and it cannot be selected. Also I noticed that Calendar and Tasks menu items were grayed as well.
So post if you are having any useful comment to fix the issue.
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