Can anyone help on this issue?

When I tried to connect to MySQL database, I got the error message:

Error Type:
ADODB.Connection.1 (0x80004005)
SQLState: S Native Error Code: 2002 [TCX][MyODBC]Can't connect to local MySQL server through socket '/tmp/mysql.sock' (2)


Below is my connecting string, is there anything wrong?

dim conn,conn_string
set conn = server.createobject("ADODB.Connection")
conn_string="Driver={MySQL ODBC 3.51 Driver}; Server=localhost; Port=3306; Option=3; Database=****; Uid=****; Password=****; "
conn.open(conn_string)


Thanks in advance.