At least with my booking, I get the following at SPG when I check my booking at W New York:

[SIZE=1]We're Sorry
The system is temporarily unavailable. For assistance, please call 866-500-8320 in the U.S. or Canada. Residents of all other countries, please see our Worldwide Reservations Offices.[/SIZE]

I think that bookings that are from PL and the like cannot be amended or even checked at SPG.com.

However this ma be different for others; I may be doing the wrong thing.

- BiziBB