SQL Command

[Justin Pratt]

I am writing a SQL statement in php with a mysql backend. I want to delete all records in a table that the city is not Colorado City, Rye, San Isabel, Beulah, or Hatchet Ranch. Right now this is what i have but it is deleting everything:

$result = mysql_query("DELETE FROM Property WHERE City != 'Rye' OR City != 'Colorado City' OR City != 'San Isabel' OR City != 'Beulah' OR City != 'Hatchet Ranch'", $linkID);

anyone have an idea of how this statement should look? Please help