Depreciation generate CERO in Depreciation Amount.

 Hi:

When I run the depreciation for some books its generate a CERO value in the Depreciation Amount. I make a incial Load with Cost,  YTD Depreciation,  Depreciation Reserve like next example:

Method: STL

Life Years: 50

Date In Service: 01-AUG-2010

Asset Cost: 228,183.66

YTD Dep: 3,422.79

Accum Dep: 18,635.17

When I run the Depreciation to OCT-10 the Journal Entry Reserve Ledger Report  generate the next lines:

Cost,                Dep Amount ,     YTD Dep,        Dep Resv

228,183.66,     0.00    ,               3,422.79    ,     18,635.17       

According to the values, the Dep  amount must be  380.31

This is nota normal behavier, in the same Journal Repot some assets generate a rigth depreciation.

Do you know some step to solve this issue?.