Germany + Benelux Ticket

This is a Germany + Benelux ticket for unlimited rides in First Class with the train in Germany, Belgium, Netherlands and Luxembourg, for six nonconsecutive days in two months, not counting reservations and fares to countries not covered on this pass (like France). This ticket has a stamp on 12th November 2004, which makes the ticket valid for two months up to 11th January 2005.

Somehow my ticket was not checked the 17th November 2004, even for the trip from Amsterdam Centraal to Rotterdam Centraal via Den Haag Hollandse Spoor and Schiphol Airport.