Try and clean the old glue off, difficult without pulling the fingerboard off. Get a Exacto knife or other thin blade in there and do the best you can, no need to go nuts. Also use some kind of pad with the blocks and clamps, I use folded pieces of leather. Just get as much Tite Bond in there as you can, clamp it up , clean up the excess, leave clamped for 24 hours and your good as new.