Fixed Assets beginning and ending balance on depreciation

Ending depreciation of previous year is not being carried over to the beginning depreciation of this year. GL balance is fine. But when I run any asset balance report or asset explorer, I see the ending balance of depreciation is different than the beginning balance.

For example - if 2010 ending depreciation is $5000.00, $5000.00 should be the beginning depreciation for 2011 - instead it's shows a different amount.

Please help.