Documentation
The first place to go if you have questions on biblatex or biblatex-dw are the documentations of the two packages.
Minimal example
If you cannot find an answer to your question in the documentation, you should create a minimal example. It is good to localise the error and to ease helping for others.
Newsgroups
If you seem to be at a loss, you can contact other LaTeX users via Newsgroups or Boards.