Sales order(VA01) discount value not calculated

Hello Gurus,

As Iam creating Sales order(VA01) In my sales order discount is not deducting .It was adding the discount value for example(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 also.

Please give me a any Solution Asap.

Regards,

Sukdev.