thanks for your reply. But I must say that you thought wrong. Soundblaster Live 24-bit is not based on Emu10k1 chipset. I find the solution.
1) use driver snd_ca0106 (not included in kernel 2.6.10-1.760_FC3, use alsa 1.0.8)
2) it seems like hardware multiplexing doesn't work, so DMIX
plugin for Alsa is needed.
this must be filled in your ~/.asoundrc or in global configuration at /etc
Maybe this post helps someone in the future.