If these things happens to you then watch this video with possible reasons why.
Since initially posting this we had to put some limits on character length, as some tried to do 28, or 30 word phrases for a clue. The limit to one clue is 20 characters (spaces count as a character).
In FAQ if you want to quickly see any words or phrases you might have that may be 21 characters or more, go back to FAQ main page and scroll to the bottom of the FAQ and you will see 4 or 5 help Tutorials to help with your word search including one that counts the characters.