Adobe Flash Player Plugin Problem on HDD Knoppix 6.7.1

[Alecossy]

TItle says much by itself but here we go..
I decided to switch from fedora 15 to knoppix 6.7 a couple of days ago because I was finding fedora too sparkly and not really sfw...
Now, I've been using chromium for a couple of hours today and then I had the idea to watch myself some videos on youtube, so I installed flash player plugin from synaptics but there's no sound in my videos...
Tried also on iceweasel and same problem...
Alsamixer shows that everything's okay, so I don't know what that could be...
Any help would be mostly appreciated :)

[klaus2008]

Do you have any sound at all? (There should be a voice at the start of the desktop environment while the splash screen is displayed.) What is the output of
cat /proc/asound/cards

[Alecossy]

I do have sounds, even though volume will always be muted on startup... Yeah I heard that voice, sound is Okay..
Output is
[CODE]
[ 0 [Intel ]: HDA-Intel - HDA Intel
HDA Intel at 0xb4100000 irq 42
1 [Generic ]: HDA-Intel - HD-Audio Generic
HD-Audio Generic at 0xb4020000 irq 43
/CODE]