Help !! VM 2.0 Catrgories does not link to product ?????

[itjackie]

I have new install Joomla 2.57 and VM 2.0.10 , i have create two categories and two product for testing. but i don't why when i click the Categories , after next page show bank. , I am not sure how can fix , pls advise how can fix. as below message.

404 The requested product does not exist.