How to make an animation for a compression spring in Solidworks 2011?

Tutorial to make animation for a compression spring in solidworks.

Answered with a tutorial: https://grabcad.com/tutorials/how-to-make-an-animation-for-a-compression-spring-in-solidworks-2011

Tutorial: How to make an animation for a compression spring in Solidworks?

I think a very basic piece of information is missing from the steps above:
The spring needs to be modelled as a revolved sweep, the animation won't work if you use a helix.

"How to make an animation for a compression spring in Spaceclaim 2015 ?"

Step 6 and step 7 is so confused to me.
When i click on centerline ( on her top point and on circuit line of the part behind) i get this option
https://farm8.staticflickr.com/7097/7355853718_45cfb4f58f_b.jpg
You get this option
https://farm9.staticflickr.com/8142/7170642697_0341afbaf1_b.jpg
WTF
I used SolidWorks 2012

Additionally to what Steen Winther said, there's another important detail that is not highlighted enough (although it is said in the tutorial) for this method to work: the coil sketch MUST be in EDIT mode before connecting the upper point of the coil axis ant the center of the upper plate.