When
you create a new FLA document, Flash asks you which version of ActionScript
you want to use. You can change this setting if you decide later
to write your scripts in a different version of ActionScript.
Note: The
ActionScript 2.0 compiler compiles all ActionScript 1.0 code, except
for the slash (/) syntax used to indicate movie clip paths (for
example, parentClip/testMC:varName= "hello world").
To avoid this problem, either rewrite your code using dot (.) notation,
or select the ActionScript 1.0 compiler.