Noir Weapons does not grow

[bong25]

I followed carefully the guide for this weapon to grow. but In my case it does not grow at all, my weapon is at lvl 40 with +5 enhancement with 100.00000% and my Toon lvl now at lvl 69, tried so many time to manual grow it with lvl 36 rare weapons and it always shows success but my weapon stays at lvl 40 +5. what could be wrong? please help

ahhh now it's solve, i have to evolve it with NPC using unique weapon