Hi, I bought a AV receiver(Pioneer VSX-323-k) with 5.1 sound system. I have connected the speakers. I don't have any televison and I want to use it with my laptop and monitor. I'm connecting my laptop with HDMI cable and the monitor with audio cable. But for some reason I'm not getting sound from my surrounding speakers and Sub-woofer. But I'm getting sound only from my front speakers. But when I'm trying to test the speakers with my laptop's software or also with the setting from AV-receiver test setting, I'm getting the sound from every single speaker. Can anyone help me what could be possible reason that I'm having the problem? Thanks in Advance.