I have never used gnome-sound-recorder with Mandriva, but I would suggest you make sure you have installed: gstreamer-alsa, gsteamer-arts, gstreamer-artsd, gstreamer-plugins, gstreamer-audiofile, gstreamer-audio-formats, gstreamer-sndfile, and the gstreamer plugins for encoding and decoding whatever codecs you need.
If you haven't already done so, go here first and follow the instructions to set up and use easyurpmi as per the instructions.