error con mysql

[sith]

ola a todos, toi intentando instalar qmail, y despues de instalar vpopmail (un gestor) me da los siguientes errores:

/usr/local/vpopmail/bin/vadduser mi_usuario@mi_dominio.com
Please enter password for mi_usuario@mi_dominio.com:
enter password again:
could not connect to mysql update server Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2) with database
could not connect to mysql update server Can't connect to local MySQL server through socket '/var/lib/mysql/mysql.sock' (2)
vmysql: sql error[c]: MySQL server has gone away
vmysql: sql error[c]: MySQL server has gone away
vmysql: sql error[b]: MySQL server has gone away
vmysql: sql error[3]: MySQL server has gone away
vmysql: sql error[2]: MySQL server has gone away
Error: Unable to chdir to vpopmail/users directory

toy desesperado q la mierda esta ya