how can put music in my ipod i try but is imposible for me to do

Is this a new problem you are having (it worked before and does not now)? Or, are you asking as someone new to iPods who does not know how to use an iPod?

If it's a new problem, you'll have to provide more details. If you don't know how, the user manual for your particular model may be helpful. It says "iPod classic" in your profile. Here are the manuals for the "iPod classic" models.

http://support.apple.com/manuals/#ipodclassic

If you have another type of iPod, those manuals are also available on the web page.