[Swftools-common] swfdump not working? :(

[Vito C]

Hi,
I installed the latest version of swf tools on my mac (snow leopard 10.6.7) 
using brew but it appears that swfdump doesn't work at all... here is the error 
i get: 
[22:34] 04.zc1 ~> swfdump -h
Exception in thread "main" java.lang.NoClassDefFoundError: Flash
Caused by: java.lang.ClassNotFoundException: Flash
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:306)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:247)