Join Date: Oct 2009
Location: Just south of sanity
Don't take this the wrong way, but how long have you been riding? Or reriding?
Less experienced, out of condition people tend to move around more than those who have been consistently riding a long time, which means their saddle pads tend to slip.
I had the exact same problem as you many moons ago, and while a nonslip pad may help, the only thing that's really going to keep that pad in place is a quiet, experienced rider.
My pads don't slip anymore, regardless of the type I use now.