if you look at your selection screen, then you see that there is no option to "archive till 31.03.2012" . Please read the OSS note 389920 - Overview of Asset Accounting archiving
it explains everything in deep detail.
Read it together with your functional consultant for Asset accounting and a key user. Let they tell you how they use asset accounting, sit together and check any single sentence in this note with the data in your system.
Archiving is not a one-man-show, it is not just a technical activity. Communication is written in bold letters. You should make yourself familiar with legal aspects too.