vl01n order release issue

Hi.

I am working on sales order change VA02. and vl01n

I need to put a condition in my enhancement.

if netwr is less than 10000.

it will release order and deliver.

In VL01n but it is giving error i.e sales order 1110001 is not released by 'user'.

include : MV45AFZZ

FORM USEREXIT_SAVE_DOCUMENT.

please suggest..