IRCTC are announcing to book retiring room via web. But when I tried to book a room at rameswaram on 28-Jan-2015, each time it replied the " slot is not available". But I am sure that I got the 1 of the earliest PNR. Because I hv booked ticket for train 22622 of 27-Jan-2015 on 28-Nov-2014 at 8 a.m. After booking, from the very next minute I tried several times to book, each time the result is same. I hv mailed to IRCTC and they replied that all the rooms are booked. Is it possible?