pricing type C not work

Hi All!

    I have a problem in a process in the company.

    I need to use the pricing type C for determined the some new condition in the billing document.

   When I executed the process using the transaction  VF01 the pricing is re-determined successfully.

   But  we need to use the Z transaction (SHDB) to automation the billing process and when the billing is created, one condition pricing disappeared in the document. This condition exist in the sales document.

    Please, Someone know why the standard transaction does work and SHDB doe not work?

    Best regards,

Julio César