I was searching a members post's by date ang got this.
System.NullReferenceException: Object reference not set to an instance of an object. at IHUtils.SearchGrammar.ConvertQuery(AstNode node, TermType type) in I:\Documents and Settings\John\My Documents\Visual Studio 2008\Projects\SearchGrammar\SearchGrammar\SearchGrammar.cs:line 86 at Boards_msgsearchbymember.Page_Load(Object sender, EventArgs e)