where to assign org determination profile for trade promotion

Hi All,

Organization units are not determining in we create trade promotion in CRM7.0 system.

Normally we create org determination profile and assign them to transaction type inorder to determine sales area or sales line in transactions.

But trade promotion is an activity rather transaction. So in avtivity we SAP has not provided any field to assign org determination profile. Can any one suggest me where I can assign assign org determination profile for trade promotion so that org data gets determined in trade promotion.

Thanks for your help.

JM