ibm http server使用mod_gzip错误！

bj_lwt2000

mod_gzip.so，复制到服务器的相应目录。
配置如下：
### loading the module gzip###
LoadModule gzip_module libexec/mod_gzip.so
AddModule mod_gzip.c

<IfModule mod_gzip.c>
mod_gzip_on Yes
mod_gzip_can_negotiate Yes
mod_gzip_static_suffix .gz
AddEncoding gzip .gz
mod_gzip_update_static No
mod_gzip_command_version /mod_gzip_status
mod_gzip_temp_dir /usr/IBMHttpServer/tmp
mod_gzip_keep_workfiles No
mod_gzip_minimum_file_size 500
mod_gzip_maximum_file_size 500000
mod_gzip_maximum_inmem_size 60000
mod_gzip_min_http 1000
mod_gzip_handle_methods GET POST
mod_gzip_item_exclude reqheader "User-agent: Mozilla/4.0[678]"
mod_gzip_item_include file .html$
mod_gzip_item_include file .shtml$
mod_gzip_item_include file .htm$
mod_gzip_item_exclude file .css$
mod_gzip_item_include file .pl$
mod_gzip_item_include handler ^cgi-script$
mod_gzip_item_include mime ^text/html$
mod_gzip_item_include mime ^text/plain$
mod_gzip_item_include mime ^httpd/unix-directory$
mod_gzip_item_exclude mime ^image/
mod_gzip_dechunk Yes
mod_gzip_add_header_count Yes
mod_gzip_send_vary Yes
LogFormat "%h %l %u %t \"%V %r\" %<s %b mod_gzip: %{mod_gzip_result}n In:%{mod_gzip_input_size}n -< Out:%{mod_gzip_output_size}n = %{mod_gzip_compression_ratio}n pct." mod_gzip
CustomLog /usr/IBMHttpServer/logs/mod_gzip mod_gzip
</IfModule>

重启http server失败。报错：
Syntax error on line 503 of /usr/IBMHttpServer/conf/httpd.conf:
Cannot load /usr/IBMHttpServer/libexec/mod_gzip.so into server:
0509-022 Cannot load module /usr/IBMHttpServer/libexec/mod_gzip.so.
0509-103 The module has an invalid magic number.
是mod_gzip.so文件错吗？谁有下载的地址？