Error Message (Enter spread / MAD type B ...) while saving sale order

hello,

when i try to create sale order (VA01) , and when i enter the custmer number (befor entring other informations ..) I get this Error Message :

"Enter spread / MAD type B for 05.08.2008 in the system settings"

the message number is : SG117

plz help me to solve this problem.

cordialy

SDA