After Close Period - Depreciation calculation wrongly.

Dear All Expert,

I am facing following issue kindly help me if someone knows I will highly thankful to you all.

After Run the revaluation & Run depreciation system (JAN-15) were calculated depreciation rightly on revalue cost but after close period system revert back depreciation charge on original cost on previous month & wrong calculated Depreciation on current month.(FEB-15)

E.g;

Run Revaluation 20

Actual cost : 15,000,000.00

Revalue Cost : 18,000,000.00

Depreciation expense 75000 (For the month of JAN) Note: system is being rightly calculated dep.

Accumulated Dep 75000

After close period & Run Depreciation

(Now depreciation charge wrongly in previous month e.g: depreciation was 75000 but now its 62500 due to wrong calculation on Actual cost inspite of revalue cost (JAN-15) & then we run depreciation where the system calculated wrong depreciation on actual cost in spite revalue cost.