Help to configure multisite permalinks (pretty urls)

I've setup a fresh WP (v 3.9.1) installation to multisite and started working with Domain Mapping and Multi Domain plugins. I can access the created sites without problem, but any pages within them are not accessible (I get a 404 error). Example:

sites.bizconsult.com.br works ok
sites.bizconsult.com.br/pagina-exemplo/ doesn't work (which is a page inside that site).

What am I doing wrong?

Thanks,

Elvis