how to Open fiscal year ax2012

Hi,

I'm trying to reverse a vendor transaction dated 26/02/2013.

i keep getting the following message,

'The fiscal period is closed for module Vendor on the date 2/26/2013'

i have open the month feb 2013 under general ledger--> setup-->ledger-->ledger calender from 'hold' status

how can i resolev this?

thanks in advance