PGSC
Not able to cancell the e ticket as the chart is being prepared

PNR-Number 252-2802815

Train Number 2006 Train Name KALKA SHTBDI

Date 26- May- 2009

From Station CDG To station NDLS

Reservation upto NDLS Boarding point CDG

Class CC No of passengers 1

Charting Status CHART PREPARED

The chart was prepared for this ticket you can not cancel this ticket.

I would like to get the above mentioned ticket canceled. The message is coming accordingly "The chart was prepared for this ticket you can not cancel this ticket" when I try for the cancellation.