How to get custom task tags to work in Eclipse?

What dialog did you use to add task tags ? You should go in "Windows -> Preferences", and next "Java -> Compiler -> Task tags". In this dialog you can add task tags. Make sure that your project is using the global task tags (otherwise you must add task tags specific to your project in the project properties dialog).

When you close the preference dialog, Eclipse should recompile your project, and the task view will show the new tags.

add new task tags for java: Windows -> Preferences