AP/PO Account Generators

We are using PO and supplier invoice account generators that basically generate the CCID based on project information and the information stored in the descriptive flexfields. If we change the project,task,org and expenditure type then the CCID automatically changes but the CCID does not change when we change the descriptive flexfield information. I'm wondering if anyone is using the account generator that takes DFF attributes to generate code combination.

Thanks,

Harish