I cant use gridmarket on frontend

I just bought the theme marketplace but can't install it
my configuration
word press network 3.5.2
classipress parent theme
jibo theme child theme
marketpress
I create a subdomain /placedesventes
and put it in the store setting, in store url slugs setting.
I installed the store link in top menu it open the link /placedesventes/but doesnt show anything of framemarket or gridmarket
I'm not very well with wordpress and I think there is a conflit beetween the principal theme of classipress and framemarket could you explain the proceed please
framemarket and gridmarket are well installed in the network admin in extension pluggin
thank you in advance