Invoice posting

Hi , I am posting invoice by f-43,

and facing this error when i enter the amount.

can anyone please help me......

No amount authorization for customers/vendors in company code 1000

Message no. F5155

Diagnosis

No amount authorization for customer/vendor line items has been specified in company code 1000 for the user group to which you are assigned.

Provided that you are not explicitly assigned to a user group, the amount authorization to the group blank (" ") is valid.

i will assign points.