Trunk lock not releasing the latch

'73 Dart Swinger, someone used a bungy cord to hold the lid down :violent1: while hauling a kids wagon... Apparently it was hooked to the latch inside the trunk lid and tied down to wear it should latch. After this mess was removed the trunk was shut and latched, now the key will turn the tumbler, as it should, but won't disengage the latch.... Any ideas?:banghead: