You should restore your database from last good backup. Also check this article: http://www.karaszi.com/SQLServer/info_corrupt_suspect_db.asp

This article is one of the best article which covers all recommended actions for corrupt or suspect databases.

If still you are unable to repair your database then you should try sql repair software. Search on Google about these software: https://www.google.com/#hl=en&output=search&sclient=psy-ab&q=sql+repair+software