Can anybody suggest a solution?

I am not able to display any plots, graphs or pictures using Python. e.g. when using the matplotlib.pyplot.imshow, I get the following answer:
<matplotlib.image.AxesImage object at 0x01C77850>
Nothing else is displayed nor any picture pops up.

It seems to me the picture is created as an object somehow but doesn't show..
I got a similar answer when trying to plot simple vectors using plot().

Do the display properties need to be set somehow?

I'm running on Win XP.

Thanks.