Wait a minute... Is this a K-1 case? If so, you have no actions required at NVC. NVC will assign a DOS case number, then forward the K-1 case to the consulate. Once the consulate has the case (or you have the DOS case number), you can proceed.
NVC fees and AOS are submitted to NVC for immigrant visas only, not K-1 visas. K-1 fees and the I-134 are handled at the consulate stage of the process.