Can't find the Modifier section in Strip properties to use curves I am using Blender to do video editing, for most part it has been great. 

I have been using these tutorials : 

As you can see from the video there seems to be Modifier section in properties of the strip modifier. 
http://youtu.be/9hR2zNBxh68?t=50s
And this one

http://www.blendtuts.com/video_editing   (if you jump to 20 mins)

But on mine there is no section like that, I am using Blender 2.62 on Ubuntu 12.04

Is there a way to enable this modifiers section. 

thanks
The reason why is simple, this feature is not in Blender 2.62. I wasn't able to find the exact version it was added but looking at the videos. I would say any version 2.68 or higher will have strip modifiers.