[Tutor] Why I can't use scipy.plt.plot?

[W. Xu]

I installed Python-2.2.3, win32all-162, wxPythonWIN32-2.4.2.4u-Py22,
Numeiric-22.0.win32-py2.2, SciPy-0.2.0_alpha_210.4077.win32-py2.2

but when I used scipy.plt.plot, an system error came out.
I am just learning how to use plt and gplt, and not necessarily use
plt.
Thank you