Catch-up depreciation not wanted

Hello,

We have the following scenario:

First an asset master record is created and it receives an acquisition value via an invoice posting. The asset value date is for example 15-01-2012.

The depreciation is straight line with a useful life of 5 years, no scrap value.

A second invoice (subsequent investment) is posted to the fixed asset with an asset value date 20-05-2012.

What happens now is that a catch-up depreciation is calculated and posted. The ordinary depreciation start date of the first invoice posting is taken into account fot the subsequent investment.

What we want to achieve is that the second invoice starts calculation of the depreciation from that asset value date (20-05-2012), not the asset value date / ordinary depreciation start date from the first invoice.

I can not seem to get it working without a catch up depreciation. Even if I use a depreciation key with 'Depreciation to the day' activated.

Any ideas how to post the subsequent investment without a catch up depreciation being calculated and posted?

We are on ECC 6.0 using the new depreciation calculation.

Kind regards,

Andre