It could be any one of a number of reasons... Your question was vague, incomplete, in the wrong category - or maybe the person best suited to answer it hasn't seen it yet !
Yes , you can answer the questions on wikianswers.
You could try being more specific in your questions, so then WikiAnswers can provide you with the best possible answer.
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WikiAnswers visitors ask questions. You wrote this one! :-)
There are over 20,000 questions about entertainment and arts questions on WikiAnswers.
Wikianswers does not answer your questions. It is people from around the globe on the internet that answer the questions.
You cannot demand answers from WikiAnswers on your questions. WikiAnswers does not answer your questions, it is the members of this community that answer your questions. You can request for your question to be answered but not demand for the same.
You can recategorize, answer questions, edit questions, and do much more on WikiAnswers.