Buddypress sign up not working

when i log into my account as a budypress member the defualt page is not sitewide activity how can i arrange this?

My sign up doesn't work neither?

Hi,

You can redirect page after log in, please check this article:
http://codex.wordpress.org/Plugin_API/F ... n_redirect
or use plugin e.g. this one:
https://wordpress.org/plugins/peters-login-redirect/

Regarding the sign up - do you have registration enabled in your wordpress General settings?