invalid old software id

Dear i have a mikrotik board 532, after formating the board, i lost the license id and i keep getting invalid old software id, any idea how to fix it?

thank u

Maybe this?

http://wiki.mikrotik.com/wiki/Manual:Upgrading_RouterOS#License_issues

You need to contact mikrotik support, email your serial number and current SoftID to support@mikrotik.com and we will issue a new key.