BuddyPress.org

When running on windows you have to manually enter the subdomains in the ‘hosts’ file.

“C:WindowsSystem32driversetchosts”

A sample from my hosts file:

127.0.0.1 ourcommoninterest.dev

127.0.0.1 burt.ourcommoninterest.dev

127.0.0.1 waldo.ourcommoninterest.dev

127.0.0.1 beckysblog.ourcommoninterest.dev

127.0.0.1 localhost

The reason is you are not running a DNS server to resolve the domains to an ip address.