Ok, it's solved. The problem was with latest alsa version and latest rme firmware version (1.53). This card needs to be burnt with 1.52 firmware version to run with alsa. I had the latest firmware and the latest windows drivers (WDM), so i had to uninstall these, and install previous drivers (not WDM). Then i downgraded the firm from 1.53 to 1.52 using the 1.52 flashing tool. :) Juan.