Aloha kevin50,
When does it start cramping?
You can continue and allow the channels to open up, or you can start simply, and not raise your legs during the Seven Steps exercise.
Relax during the exercises - it's like riding a bike, when you start off, you are in your head and using more muscles than what's required. After while you are more in your body as it and your mind relaxes and goes with the flow and feeling, rather than not falling / doing it right.
Much Love, Shawn