Sorry for the mistake of file lists!
But the problem is solved. (With Dependency Walker we saw that pygame
for python 2.5 was installed, but we use python 2.6.)
Thank you for the help!
PS. Next week we will start three courses in Python and also some
pygame. If you have any small and nice games in pygame, please send
them to me. (It would be nice to be able to show some games during the
beginning of the courses and say "In the end of the course you will be
able to understand how this games are done and be able to modify them
a bit.)
\H