I solved the problem. I didn`t have any line parallel to x-axis (red axis).

Google SketchUp 8 - Windows 7 x64

Error; #<NoMethodError; undefined method `all_connected' for #<Sketchup;;ComponentInstance;0xaccf740>>
C;/Program Files (x86)/Google/Google SketchUp 8/Plugins/clf_shape_bender/clf_shape_bender.rb;307;in `line_picker'
C;/Program Files (x86)/Google/Google SketchUp 8/Plugins/clf_shape_bender/clf_shape_bender.rb;239;in `onLButtonUp'
C;/Program Files (x86)/Google/Google SketchUp 8/Plugins/clf_shape_bender/clf_shape_bender.rb;307