From DD-WRT Wiki
Don't immediately post a new topic!
Begin by reading the forum rules and guidelines.
As many, many questions have already been asked and answered, the forum contains a wealth of information as well. Yes, it may be a little harder to dig up the topic where your problem was solved, but the digging you do will have a benefit too: you will come across a lot of useful information on the way.
Before posting, do an extensive SEARCH on the forum or with your search engine of choice for better results. Using various keywords may lead to the topics that can help you, saving everyone a lot of time.