行不在QCView中显示，但在Quartz Composer Viewer中显示

I have a Quartz composition that draws lines using Kineme GL Line objects. My client complained about aliasing effects, so I replaced all the Kineme GL Lines with regular Line objects. I see a lot of improvement with respect to aliasing when I press "View" in Quartz Composer, and everything looks good. However, in my Obj-C application, these lines are not drawn in the QCView, no matter what. Is there something needed that I'm missing in order to enable these lines to be displayed?I have a Quartz composition that draws lines us