erro sock qmail

ola amigo

estou tentando conf o qmail com um banco local mas qdo tento criar um dominio via vpopmail ele me retorna o seguinte erro

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[3]: MySQL server has gone away
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

alguem poderia me ajudar??

abs..