Reply to MF Echo Freeze Help

Need some Help DJTT Forum.

I recently watched this video posted on DJTT a while back. It is about switching tempos using echo freeze then applying a filter to the echo.

http://www.youtube.com/watch?v=7w18h...452&lf=mh_lolz

Using Traktor Pro 2 and my midi fighter Instant Gratification, I press Echo Freeze, stop the track as Ean advised so just the Echo continues, but then when I apply a filter or any effect using the midi fighter or my other midi controllers, nothing happens?

How do I get Traktor allow me to apply filters to the Echo? What am I missing from the video?

Thank you.