look in inverse Kinematics (I think), and make sure that the legs are locked; etc. Another thing I do sometimes, is use the bottom right column (where you choose cameras, etc., in Poser 4..not sure what version you're using), select 'body', then dial you x,y,z, and other cartouches to position the figure..but that's me..

I wish I'd said that.. The Staircase Wit

anahl nathrak uth vas betude doth yel dyenvey..;)