[PyMOL] PyMol can't show molecule as line

Hello, I've just installed Python2.7 and pre-compiled PyMol 1.6 on my WindowsXP by following the instruction at PyMol wiki. The installation went through, and most function on viewing/drawing a molecule are fine except that "show as lines" doesn't work. When clicking "show as lines" or typing the

[PyMOL] Py

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