you seem to be doing it correctly Lin
you have an ongoing thread in the spinal forum here
http://neurotalk.psychcentral.com/thread194521.html
plus I also see a thread that you have just started on the New Member Forum
http://neurotalk.psychcentral.com/thread194569.html
Do take a look at the helpful thread link I posted before here as it really can answer many newbie questions
http://neurotalk.psychcentral.com/thread18185.html