BuddyPress.org

hi my buddypress wont let me post in the Activity feed as known as whats new
the button is there i know coz i look at the code but i dont know how to fix this so if any one can really help it be good as i need it for people to post please tell me how to fix it if you need plugs that i have i can put them here
please there are people on my site that needs it i only had my site few days ago not even that after i insaill it it was ok but the next day it went of i dont know why
i also have where i can upload photos thats not there either