Nice that you tried it out! As you got the remaining 50% back as unreacted starting material, then at least it is selective for the nitroalcohol and does not give the alkene under these conditions. By avoiding the nitrostyrene, the borohydride reduction will not cause the formation of any dimers through michael addition.
3,4,5-TMB is a notoriously bad substrate in the Henry reaction with many catalysts, EDDA gives 15-30% yield if I remember correctly. If you try another substrate I'm sure it will go much better.