while creating material MM01 i face Error this Sales org. XXX, distr. channel XX invalid sales area

Hello Guru Ji

while creating material MM01 i face Error  Sales org. XXX, distr. channel XX  invalid sales area.

I already complete below definition & assignment activitys.

sales organisation, distribution channel to plant assignment, and sales area assignment.

still i am facing same error.

please suggest...

Thanks in advance