WordPress MU

hello

how i can add link in mu ?

i add forum to my site

but i got error 404 ?

Gonna need more details than that.

Where are you trying to add the link from?
Are you trying to add a link into your themes?
Or Are you trying to add it into the Dashboard?

How have you added the link?

i mean in my site i have mu

i want add forum in my site ( mybb )

when i upload the forum i try open

mysite.com/mybb/

i got error 404 ?