OK I have reinstalled wordpress MU, I have configured this time 2 blog into 1 database. I have red this post: http://codex.wordpress.org/Editing_wp-config.php#Custom_User_and_Usermeta_Tables
for share user table becouse I want share user of network.
I try to register an account on Network but when I go to login on site B I read:
You attempted to access the "xxxx" dashboard, but you do not currently have privileges on this site. If you believe you should be able to access the "Urbanfile Network" dashboard, please contact your network administrator.
I do not know what to do. I need a simple configuration for 2 sites that use the same users who register on the network and they can log in from both.
Thanks in advance and sorry for my bad english.