Headphones, speakers, receiver... problem with sound

Hello. I am posting this on like 5th forum, because i don`t get answer anywhere. So i really hope, i will get help here.

I am using:

- Vista 32
- asus p5kc motherboard
- realtek hd audio manager

So here is the thing. I have plugged in headphones with microphone (purple and green cable) and i have plugged in pc speakers (green cable). I also have plugged in receiver for home cinema for music listening (plugged in via spdif out. That is all plugged in on the back of the computer.

Here is the problem. The headphones with microphone works good (can hear all sounds in, can talk in microphone,...), the speakers dot`t work (no sound at all comming out), the receiver not working (no sound). And basicly what i want is, that heapdhones work as they are now, i want speakers to work (so when i want to listen on speakers i just put my heapdhones down) and also i want receiver to work (to turn of speakers when i want to listen the music on receiver).

I have tried everything (switching plugs,...) and it doesnt work... Basicly i dont know, if i need to setup the audio manager or something in windows.. i dont know....

Please any1 help me, i dont know what to do, been like that for 3 days now.. cant find solution. Ty very much.