I can´t render my fireworks

Support Compositing and Post Processing
1

Hi

I am a begineer in blender and i have followed a tutorial from this website (how to make fireworks), my problem is that after following all the steps when i try to render, my image is blank.
If i press alt + a i can see the particles doing their job but i can´t render it.
Anybody can tell me what im doing wrong?

Thanks

2

Link to the tutorial plz? and maybe post a blend file.

3

This is the link,i dont have any blend file because i deleted it

http://download.blender.org/documentation/oldsite/oldsite.blender3d.org/111_Blender%20tutorial%20Fireworks.html

4

i think you forgot to set up your camera aright.