emacs calendar bug ??

[Fisherss]

Hi guys

I just have a problem about emacs calendar mode. 

When I use "t d" to export current day calendar to a .tex file, it generates a 
blank tex calendar file like the ones in a supermarket, but I have  inserted 
diary with "i d", looks like it doesn't work like I thought. 

My problem is, is that a bug or calendar mode just comes without this function 
(generating .tex file with diary added by-hand) ?

Thanks.