Out put type enhancement for Inventory management ( ME)

Hi experts,

Output type,access sequence,condition table created for inventory management and we want to enhance this ouput type.

i have appended the custom structure for KOMB and KOMPBME sructures and activated.

but when i goto field catolog screen to select the custom fields through NACE tcode, i couldn't find the custom fields under the

KOMPBME structurre.

Please help how can i get the custom fields on the field catlog screen.

Thanks