Whispers of Doom blasphemy not working with demon form

When i use demon form with blasphemy and one curse (flammability) it works. When using two curses with Whispers of Doom i can apply both curses when not switching to demon form but when i switch the aura disappears. No supports socketed into demon form

Edit:
After skilling out of Whispers of doom i cannot use even one curse or other spirit skills in demon form anymore. Before it was possible