My RAW data extension for datahub is not getting load . i cant see this extension in datahub log.

i am following 6.4 trail for datahub . i am loading hello-raw-datahub-extension.xml but its not getting load in datahub as i can see in datahub log file there is no such file with this name . Expert can you please help me why its not getting loaded... I am also sharing my datahub webapp.xml file