How does one animate the position of a sketch block?

Hi,

I am using SW2007 and in the "Online User Guide" under "Introduction to Solidworks Animator" it says

"You can animate the following:

. Component position

. Blah, blah, blah...

. Position of sketch blocks."

I have tried blocks in both parts and assemblies, but the animator timeline is never populated with the blocks. If I move the blocks, nothing shows in the timeline either. I understand that the blocks can be "manually" animated, but the help files are clear in that animator should be able to automate sketch block positions as it would a part.

Has anyone successfully animated sketch blocks?

Thanks!