Posting Depn for the entire month when asset is purchased on last day

Hi

We have a scenario where we want to post the depreciation for the entire month in case of acquisitions and additions though the asset is purchased at the end of the month. I purchased a asset on 25102007 which is 7th period for my client. When I run the depreciation through AFAB it is calculating depn for only 3 days i.e., 25, 26 and 27th which is end of the 10th month for the client (UK). Where I am making the mistake. How should i configure the system to calculate depn. from the beginning of the month rather than on prorata basis.

Regards

Brahma