Finally is working well. Thanks for the replay, i am using oss mixer instead of alsa. What i did is that:
First, oss (not alsa emulation) is not supported by my soundcard in fc4 orginal kernel, so downloded the last version in http://www.opensound.com/ossapps.html.
Before installing the that version of ossmixer, i disable the alsa and oss support of the kernel, so i had to recompile it. Thats because i had conflicts problems while alsa and the last version of ossmixer when the both were installed at the same time.
Finally i installed the last version of ossmixer, reboot and the configure it with ossxmixer.
Well i hope it helps to anyone, cheers