Its, because in c-script you write it like this:

my.ENABLE_BLOCK = ON; // make entity sensitive for block collision
my.ENABLE_ENTITY = ON; // make entity sensitive for entity collision

Look for the examples in the manual about "event". There are two separate examples because of that.

http://www.puppenheim.org/
http://www.wuerfels-welt.de
Old Game Tutorial: http://www.puppenheim.org/MITutorial.zip
Free Game Editor: http://puppenheim.org/AlienalsWeihnachtsmann.zip
http://www.puppenheim.org/blender_starting_main_settings.txt