Activate siproxd modules

I have found after successful installation of siproxd, siproxd-mod-codecfilter and siproxd-mod-logcall via luci or opkg when I try to start the modules such as siproxd-mod-codecfilter and siproxd-mod-logcall via the configuration file in /etc/config/siproxd I get the following error message:

ERROR:plugins.c:92 plugin plugin_logcall.so not found - skipped
ERROR:plugins.c:92 plugin plugin_codecfilter.so not found - skipped

someone has an idea?