Morphological Image Processing Tools

I work at windows XP and am using Python 2.2.3.

There is a problem when I intend to show an se like this:

b=mmsecross(3)
>>> print mmseshow(b)
[[0 0 0 1 0 0 0]
[0 0 1 1 1 0 0]
[0 1 1 1 1 1 0]
[1 1 1 1 1 1 1]
[0 1 1 1 1 1 0]
[0 0 1 1 1 0 0]
[0 0 0 1 0 0 0]]
>>> a=memshow(b,'EXPAND')
>>> mmshow(a)

The image only get black. If I show with mmshow(b) instead I get an image
with size one pixel per element.

Is there any known fix to this?