ordinary depreciation date in new valuation area

Hello experts,

I have a problem that I don´t know how to solve:

I created a new depreciation area to store asset parallel valuation and then uploaded the values in the new area with take over date 31.12.2007 even though we are now in 2010, I´ve set 2007 as the last fiscal year closed in asset accounting to be able to do this.

For this new area depretiation will start at 01.01.2008 in all assts and useful life will be different to the useful life in area 01, but the problem is that when uploading the useful life for the new depreciation area and setting depreciation start 01.01.2008 the system cancels depr. Start date and the explanation given by the system is the following: No ordinary depreciation was calculated in depreciation area 12. This may be caused by a change to the depreciation key.

Does anyone know how can I solve this problem?.

Thank you in advance,

rmb