Flag error credit card payment

Hello,

I'm configuring StoreBox theme for a ecommerce website. I use a plugin for credit card payment and I need that when people fill the creditcard number field, it automatically shows the flag (visa or mastercard).
With Storebox it doesnt show. So I contacted the plugin developer. He says that this is a Woocommerce feature, and if its not showing the problem is with the theme which has no support for this ecommerce feature.
I put to screenshots to illustrate my problem, one shows Storebox and the other shows the theme Storefront from woothemes.
Is it possible to help me solve this issue?

Thanks in advance,
Bruno

Hi,
Could you please provide me with a URL to your website and back-end access via PM (click the “Private Message” text underneath my avatar) so that I may analyze it?