There is a bug in the Ubuntu release (still in 10.04) that causes a mismatch between the Asterisk 1.6 package and its addon package. This results in the error message: WARNING[4238] loader.c: Module 'app_addon_sql_mysql.so' was not compiled with the same compile-time options as this version of Asterisk. To produce this error you just need to apt-get install asterisk-mysql in an effort to get the cdr logging to a mySQL database (assuming that you also used aptitude to install Asterisk 1.6 of course). In order to fix it do the following: aptitude purge asterisk-mysql apt-get build-dep asterisk-mysql apt-get -b source asterisk-mysql dpkg -i asterisk-mysql_1.6.2.0-1_i386.deb Do this in a temp folder as it will create a number of .deb packages. You may need to change the filename depending on your hardware architecture. The idea is to uninstall the faulty package that Ubuntu created and then compile a copy of the addons that matches the current Asterisk version. Since you've h...