I'm going to guess that you copied the .so file in the dir and tried to load it... but thanks to the wonders of libtool you actually copied a bash script the real mod_radius_cdr.so is in .libs/mod_radius_cdr.so this is why you type make mod_radius_cdr-install and you won't encounter this.

/b

On May 13, 2010, at 4:49 PM, budi wibowo wrote:

dear list
i follow http://wiki.freeswitch.org/wiki/Mod_radius_cdr, but onexecution i found some error 

2010-05-14 04:42:00.182283 [CRIT] switch_loadable_module.c:871 Error Loading module /usr/local/freeswitch/mod/mod_radius_cdr.so
**/usr/local/freeswitch/mod/mod_radius_cdr.so: invalid ELF header**

trying to google but luck

regards

budi wibowo