The following (see below) is what I get on IRCTC website for your query i.e., it is allowing reservation and the total fare is Rs. 2992.47
As for the WL, may be the quota is full. The ERS - NZM quota maybe still available - it can part of a algorithm that allows distance based quota. But travel is allowed as you can buy a WL ticket.
Regards
Journey...
more... Details
Train No./Name : 12431 / RAJDHANI EXP Journey date : 16-Dec-2014 Class : SECOND AC
From Station : ERNAKULAM JN - ERS To Station : PANVEL - PNVL Quota : GENERAL
Boarding Station : ERNAKULAM JN - ERS Reservation Upto Station : PANVEL - PNVL
Passenger Details
S. No. Name Age Gender Berth Preference Meal Senior Citizen
1 afaff 23 Male LB Veg No
Availability Details
Availability : PQWL2/WL2
Availability At : Fri Oct 17 20:09:54 IST 2014 IST
Fare Details
Ticket Fare : ₹ 2970.00 *
Service Charge : ₹ 22.47
Total Fare : ₹ 2992.47
* Ticket fare includes Service Tax of ₹ 97.00