Sound problem on win7

[meuludne]

Hi i have a problem whit sound on win 7. I use sound card on my motherboard Gigabyte M57SLI-S4 and realtek drivers. Bat here is a problem realtek detect my speakrs, and when i select it on 5.1 and when i click test (sound) i hear thet the speakers work great. bat when i open youtube or play some song on wmp, sound wont come up from spikers. Whats vrong. I have another sound card (creative sound blaster audigy 4) and creative drivers, on this sound card sound vork great bat somtimes is sound like deformed. the bass are deformed and in game the sound is deformed. So i think here is a problem whit sound card so i remove it. bat on motherboard sound doesnt work. What is wrong WHY? A lot f people told me that dey hatd the same problem whit no sound on vindows 7. And when i asked how they fiked the problem, they say that it fixed automaticly. Bat i steel dont have sound.
meybi some pic could help you


ps. SRY for bad english.

 

[meuludne]

an yes. when i play song in wmp or whatever the windows detected sound like in the pic the green line is getting up and down bat no sound come out from my speakers. Mybi i need to set up some settings? I stell not a pro on win 7. And on win xp. soud was working great. Yust in win 7 is something wrong. Btw if is this inportent i have original win7 ultimate 32 bit .
ps. sry for bad english