[Samba] Mysql + Samba, please help....

[open]

Hi Guruz, sorry for the bad English and the stupid question...
I configure samba-3.0 with such options
 ./configure --prefix=/usr/local/samba --with-expsam=xml,mysql --with-pam --with-pam_smbpass

after install
i try ./pdbedit -L and i get the following error

No builtin nor plugin backend for mysqlsam found
Loading mysqlsam failed!

my config file
......
passdb backend = mysqlsam
;passdb backend = plugin:/usr/local/samba/lib/pdb_mysql.so:mysql

;passdb backend = mysql:mysql
mysql:mysql host = localhost
mysql:mysql user = root
mysql:mysql password = alexander
mysql:mysql database = samba
........

i try many variants .... but get the same error

No builtin nor plugin backend for mysqlsam found
Loading mysqlsam failed!

Any idea ????
please help!!!!!

Openkin Alexandr.