Last Updated on December 1, 2011 by Dan Nedelko
Ok looks like its an RTFM issue hopefully After installing the tumblog or WooThemes supported Tumblog you need to go to Settings > Permalinks and save your permalink structure again This re registers the custom taxonomies with the Tumblog plugin
Heres the reference from WooThemes Tumblog Support httpwwwwoothemescomsupportwootumblog
Now the question is did it work