Dynamic configuration "null" value returned

Hi all,
I have reviewed the Michal blog and created a function to return the directory name, but it always returns a null value...
Here is the code:
DynamicConfiguration conf = (DynamicConfiguration) container.getTransformationParameters().get(StreamTransformationConstants.DYNAMIC_CONFIGURATION);
DynamicConfigurationKey key = DynamicConfigurationKey.create("http://sap.com/xi/XI/System/File","DirectoryName");
String ourSourceDirName = conf.get(key);
return ourSourceDirName; 
I can't find the error....
i will reward points....
Gerardo.

Hi 
Please check the Adapter setting also and need addtional parameter where it return the value like
DCJMSReplyTo
DCJMSTimestamp

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