InnoDB is missing

[Dimitri Fontaine]

Hi,

I'm using the mysql version
mysql Ver 14.12 Distrib 5.0.77, for redhat-linux-gnu (i686) using readline 5.1
on CentOS Linux 5.5.

When I try to use innoDB, I get the following message
Your MySQL server does not support InnoDB tables or InnoDB support is disabled.

mysql> show engines;
+------------+---------+-----------------------------------------------------------+--------------+------+------------+
| Engine | Support | Comment | Transactions | XA | Savepoints |
+------------+---------+-----------------------------------------------------------+--------------+------+------------+
| CSV | YES | CSV storage engine | NO | NO | NO |
| MRG_MYISAM | YES | Collection of identical MyISAM tables | NO | NO | NO |
| MEMORY | YES | Hash based, stored in memory, useful for temporary tables | NO | NO | NO |
| MyISAM | DEFAULT | Default engine as of MySQL 3.23 with great performance | NO | NO | NO |
+------------+---------+-----------------------------------------------------------+--------------+------+------------+
4 rows in set (0.00 sec)

The engine InnoDB is not available.

When I try to activate it in my.cnf I get the following error message:
110112 02:25:01 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql
110112 2:25:01 [Warning] '--skip-locking' is deprecated and will be removed in a future release. Please use '--skip-external-locking' instead.
110112 2:25:01 [ERROR] /usr/local/mysql/libexec/mysqld: unknown variable 'innodb_data_home_dir=/var/lib/mysql/'
110112 2:25:01 [ERROR] Aborting

110112 2:25:01 [Note] /usr/local/mysql/libexec/mysqld: Shutdown complete

My my.cnf innoDB config is

# Uncomment the following if you are using InnoDB tables
innodb_data_home_dir = /var/lib/mysql/
innodb_data_file_path = ibdata1:10M:autoextend
innodb_log_group_home_dir = /var/lib/mysql/
# You can set .._buffer_pool_size up to 50 - 80 %
# of RAM but beware of setting memory usage too high
innodb_buffer_pool_size = 16M
innodb_additional_mem_pool_size = 2M
# Set .._log_file_size to 25 % of buffer pool size
innodb_log_file_size = 5M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit = 1
innodb_lock_wait_timeout = 50

There is no skip-innodb parameters in the config file.

Any Idea?
Thanks for your help.

Regards
Dimitri