I've installed VM ver.1.1.0 and it was a clean installation.
I set the payment method with "Purchase Order" and set the "shipping rate" manually.
Problem comes up everytime the "check out step" on the"ship methods" step and it always said "Error: please select another shipping methods"
Why this happen

I use Joomla ver.1.0.12
Thanks alot... I need it badly....