Currency doesn't update automatically

Hi Guys!

I've just installed the OC v.1.5.4.1 and as I'm configuring it I noticed a little problem with the currency auto update. I set the Brazilian Real as follows:

Currency Title: Real
* Code: BRL
Symbol Left: R$
Symbol Right:
Decimal Places: 2
Value: 1

I know it works right because I have another v.1.5.3.1 where it works fine. Could I be doing something wrong on this one???