Not letting me adjust the volume....

Hello. I have a Mid 09 MacBook pro running 10.7.1.
(however this problem was also occurring before the upgrade to 10.7.1..)

When I play music from multiple sources like youtube or itunes the sound plays very low. When I try to raise or lower the volume it shows my the screen you will see in the photo below.

What is that and how can I fix it so I can make my volume louder?





Thank you






.

Did you already solved the problem ?
Itunes it self has a option to lower or turn up the volumes .
Did you use this option on the top bar of Itunes .
Beside that you can turn up, lower it Speaker icon

dobby said:

Did you already solved the problem ?
Itunes it self has a option to lower or turn up the volumes .
Did you use this option on the top bar of Itunes .
Beside that you can turn up, lower it Speaker icon

Click to expand...

yeah everything is a max volume in itunes and i use the speaker button on the keyboard and nothing happens... i just get that pop up like the phone in the photo above....