Multi-word DMA – UDMA

i have problems with my PC, bouth ide chanels work in multi-word dma2! since how long, i don’t know. i have tried to reinstal Via Hyperion drivers, uninstal them, tried also to uninstal bouth ide chanels. tried to recheck drives from BiOS… nothing, when my Windows loads, it finds new drives and they all stay in m-w dma2. i have tried to instal older Via 4-1 v4.43, Via Hype v5.04, v5.07 and leatest v5.08, but nothing!!

i have:
WinXP SP2
Shuttle av49n [via p4x400 chipset]
first ide ch: master wd hdd [udma-5]
slave maxtor hdd [udma-6]
second ide ch: master liteon dvdrw [udma-4]
slave maxtor hdd [udma-6]
this is the configuration, they should be! they was before…
please help. tnx!