tv-card sound problem

Hi! I have a problem with my PVR2000 from Leadtek (version 1, with the four-pin audio cable) I am unable to get sound to work on live tv or fm, but recorded TV's fine. I have an Intel D945PVS motherboard, and here comes what I believe to be the cause, no four-pin audio connector on it. I therefore hooked up the audio connector to my DVD-burner (Nec 3550, read somewhere on this forum it might work) but still no luck. I use the standard Leadtek software, latest version downloaded from the website this Saturday, on Win XP Pro with all the latest updates. Is there a way to get the sound up and running with this software or will I have to switch to something else? Additional strangeness: when I check the "capture setting" page, "audio recording line" is greyed out. I set the audio-out control line to cd player and in the FM config the same. Audio recording line is set to line-in. Any advice?