Wondering if someone can help me?

I'm drawing a light fixture (hanging pendant type) with a power cord that has a slight bend on a differant Work Plane then the rest of the power cord and I cannot constrain that curve. When I "flex" the drawing curve stays stationary but the rest of the fixture can be moved up or down! Please see my attached Snap Shots. Can anyone give me some advice how to resolve this issue? thanks all3D View.pdfFront View.pdf