It´s Working ??

Hello, I've spent a lot of time trying to get Black Qiraji Resonating Crystal, Black Qiraji Battle Tank, Scarab Lord, my doubt is... every time I try to enter the dungeon Blackwing Lair they says it is closed, will it work again? cause i get in like 1 week ago, Can the achievement be achieved, and the mount?

Plis help...

Hola he pasado mucho tiempo intentando conseguir Black Qiraji Resonating Crystal, Black Qiraji Battle Tank, Scarab Lord, mi duda es... cada vez que intento entrar me dice que las mazmorra (banda) La Guarida de Alanegra, esta cerrada, va a volver a funcionar ?? porque hace como una semana pude entrar, el logro sirver ? se consigue la montura ?
gracias

Thanks