Trouble when using Calculate Currency in PBCS

Hello everyone,

I am trying to convert the local currency to the reporting currency in PBCS by using "Calculate Currencies" .

Step 1: I input the exchange rate in the system form:

Step 2: I input data for VND currency is 100.000

Step 3: I go to the final result form and click on "Calculate Currencies"

However, the result for THB_Reporting is the same as VND that I input in step 2. It used exchange rate is 1 instead of 800.

Did I miss any steps?

Thanks and have a nice day!