KMyMoney not updating stock prices

Hello there,

I started using KMyMoney for windows several months ago (installed under KDE for windows - windows vista home premium).
This program worked rather wel but recently I am unable to update stock and currency prices. Somebody at the KDE for windows forum for KMyMoney users told me that my antivirus (avast free) is blocking KIO.

Somebody encountered the same problem? How can I solve it?

thanks for the help

See if that helps:
avast! GUI → Web Shield → Expert Settings → Main Settings
Enable: Scan traffic from well-known browser processes only