Cassandra won't start Java Issue Snow Leopard

[Alberto Velandia]

Hi I'm getting this error when i run bin/cassandra -f

Exception in thread "main" java.lang.NoClassDefFoundError: 
org/apache/cassandra/thrift/CassandraDaemon
Caused by: java.lang.ClassNotFoundException: 
org.apache.cassandra.thrift.CassandraDaemon
        at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
        at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:248)

which seems to be a Java version issue, I've updated my ~/.profile to the 
following:

export 
PATH="/System/Library/Frameworks/JavaVM.framework/Versions/1.6/Home/bin:/usr/local/bin:/usr/local/sbin:/usr/local/mysql/bin:$PATH"
[[ -s "$HOME/.rvm/scripts/rvm" ]] && . "$HOME/.rvm/scripts/rvm"  # This loads 
RVM into a shell session.

but I'm still getting the same error, I've also set the environment variable 
JAVA_HOME but I don't know If I did it right.

can anyone help me? thx