Why the innodb config do not apply in mysql server?????

[GhOsTisp]

My innodb config in my.cnf is this

innodb config in my.cnf////////////////

[innodb]
#skip-innodb
innodb_data_file_path = ibdata1:100M:autoextend
innodb_buffer_pool_size = 5500M
innodb_additional_mem_pool_size = 20M
innodb_log_file_size =1900M
innodb_log_buffer_size = 8M
innodb_flush_log_at_trx_commit =1
innodb_lock_wait_timeout = 300
innodb_max_dirty_pages_pct = 90
innodb_thread_concurrency = 8

i restarted with service mysqld restart .... and after show this in my config

mysql> show variables like '%innodb%';
+-----------------------------------------+------------------------+
| Variable_name | Value |
+-----------------------------------------+------------------------+
| have_innodb | YES |
| ignore_builtin_innodb | OFF |
| innodb_adaptive_hash_index | ON |
| innodb_additional_mem_pool_size | 1048576 |
| innodb_autoextend_increment | 8 |
| innodb_autoinc_lock_mode | 1 |
| innodb_buffer_pool_size | 8388608 |
| innodb_checksums | ON |
| innodb_commit_concurrency | 0 |
| innodb_concurrency_tickets | 500 |
| innodb_data_file_path | ibdata1:10M:autoextend |
| innodb_data_home_dir | |
| innodb_doublewrite | ON |
| innodb_fast_shutdown | 1 |
| innodb_file_io_threads | 4 |
| innodb_file_per_table | OFF |
| innodb_flush_log_at_trx_commit | 1 |
| innodb_flush_method | |
| innodb_force_recovery | 0 |
| innodb_lock_wait_timeout | 50 |
| innodb_locks_unsafe_for_binlog | OFF |
| innodb_log_buffer_size | 1048576 |
| innodb_log_file_size | 5242880 |
| innodb_log_files_in_group | 2 |
| innodb_log_group_home_dir | ./ |
| innodb_max_dirty_pages_pct | 90 |
| innodb_max_purge_lag | 0 |
| innodb_mirrored_log_groups | 1 |
| innodb_open_files | 300 |
| innodb_rollback_on_timeout | OFF |
| innodb_stats_on_metadata | ON |
| innodb_support_xa | ON |
| innodb_sync_spin_loops | 20 |
| innodb_table_locks | ON |
| innodb_thread_concurrency | 8 |
| innodb_thread_sleep_delay | 10000 |
| innodb_use_legacy_cardinality_algorithm | ON |
+-----------------------------------------+------------------------+
37 rows in set (0.00 sec)

Why the innodb config do not apply in mysql server?????

[Server info]
My server is CentOS release 5.2 (Final) ,

MySQL
Server version: 5.1.52-log
Versión del protocolo: 10
Usuario: admin@localhost
Juegos de caracteres de MySQL: UTF-8 Unicode (utf8)

Server web
Apache
Client version : 5.0.77
extensión PHP: mysql

Server version: Apache/2.2.3
Server built: Nov 12 2008 10:40:14
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