I got the Hilton e-mail with the $105 offer today. Did you try double occupancy, at least 3 days, and are you booking 21 days out? T&C below:

Terms & Conditions:

* Reservations must be booked and paid for with a valid Visa card. This offer is subject to tax when applicable. Void where prohibited, taxed or restricted by law. Advance reservations required. Minimum 3-night length of stay. Offer valid for bookings for travel until December 31, 2006, in the Caribbean, and June 30, 2006, in Latin America. Alcoholic beverages, taxes, service charges and gratuities are not included. Offer may not be combined with any other promotion. The 50 USD Food and beverage credit cannot be redeemed for cash. Offer redemption and fulfillment is solely the responsibility of the merchant making the offer. Visa reserves the right to modify or cancel this offer at any time and without notice. The Hilton name and logo are trademarks owned by Hilton. ©2006 Hilton Hotels.

** Offer is based on double occupancy, 21 day advance purchase, subject to availability and seasonal variations. Hilton HHonors® membership, earning of Points & Miles®, and redemption of points are subject to HHonors Terms and Conditions. ©2006 Hilton HHonors Worldwide.