Where is my original animation?

Hi All,

This is probably basic because it's my first attempt - after 2 hours I have a great walk cycle following this the video here: https://www.youtube.com/watch?v=C4_x0SpUJUA

I saved the file then realised I wanted the animation to go slower.  I decided to space the keyframes out but on opening the .fla file the animation doesn't have the keyframes as they were when I created the animation, only showing them at the end.  I'm now not sure how to get back to where I can space them out.

Appreciate any help in solving this.