In order to start a thread or reply to a thread in the forums you must be a registered user. Once registered you will then need to navigate to the category that your question fits in best.
For example, if you have a question about your desktop audio, then you will click first on Desktop.
Then find the Desktop Audio Forum.
Once you're here you'll see a tab that says New Post:
Once you click "New Post" you will see an open box. Type a subject title and in the box below it, your question.