Hi mayork(and Iam2),
That sight has been up and down since the beginning. I don't know what the problems are, but it 'is' down for the time being.
I am glad you are liking SFQ. I would suggest getting level I, if you haven't. Master Lin addresses the Self Concentration Meditation in the level I manual. You should try other aspects of qigong practice too. The active exercises, and, small universe meditation, are also part of level I.
It is ok that your mind is wandering. Let it wander. Let it relax, too... Your gentle focus, can be grounded in the smile, the youthful thoughts, the sunshine ,and the joy. When you observe you have been wandering with your mind, and you are 'aware', just sit in that present moment and revisit those good feelings and visualizations. Your experience, insights, and awareness will change over time, simply by pursuing your practice , as given.
love,
gallen