i configured packing proposal

hi,

sap gurus,

i configured packing proposal.

when i create a packing proposal in sales order level it is asking in pricing for the packing material.

when i create direct automatic packing at delivery leve it is not for pricing but when i go for billing it is

asking for pricing at billing level.

as per rule we are maintaining packing inventory also and it should not ask for pricing.

but it is asking at delivery or billing level

where i did wrong

please suggest me

regards,

balaji.t