Sales order(VA01) discount not calculated

Hello Gurus,

As Iam creating Sales order i.e VA01 in our business scenario the discount should be calculated but here the discount is not calculated. It was adding the discount value i.e 100+2=102,but it should be 100-2=98.I have checked the pricing procedure also.

Please find below I have attached the screen shot.

So please give me solution Asap.

Regards,

Sukdev