Make sure that you put 50 words in the "Why us" section, that will definitely be 50 characters as asked for, you also need to make sure you put the right rule as asked too.
^^ Those requirements are usually the parts that rejects people the first couple of tries, If you still have problems after making sure you've answered all questions correctly then contact "ItsLawrence" through PM on the site or speak to him in game if you see him