Trouble upgrading audit plugin version

I had trouble upgrading audit plugin from 1.4.2 to 1.4.4.

Here is what I did :

• on the database : UNINSTALL SONAME 'server_audit';
• remove the configuration lines concerning the plugin in my.cnf
• restart the base
• remove the library server_audit.so (version 1.4.2) from /lib
• restart the base
• put the new library server_audit.so (version 1.4.4) into /lib
• on the database : INSTALL SONAME 'server_audit'; (result is OK)
• restart the base (result is OK)
• after few seconds : database crash -> lose connection and then can't connect back

I tried three times (sometimes with less base restarts), base crashes everytime after installing the new version and restart.