lite-c is case-sensitive, and c-script wass too, but only a bit.

Most flag values, like PASSABLE, INVISIBLE etc are all upper-case where
they were lower case in c-script.

Also, in your script, anytime you come across a value being set to ON, thats c-script.
It needs changing to the lite-c "set" function.
IE
colt.passable = on; should be set(colt,PASSABLE); and
colt.passable = off; should be reset(colt,PASSABLE);
Check "flags" in the manual for more info.