how do I put in a google adsense code?

[gramme]

Hi,
I have spent most of my day trying to put in a Google ad-sense code! I keep putting the code in the website properties, placeholder html box, but can't get it to work.
Can someone tell me how to get this code in?
Do I need to create a placeholder first? Is so, how do I do that. I have tried to drag a box then use the text tool, then go to the website properties and use the placeholder but can't get that to work either!!

Very frustrating please help me out here....I love this program but not having control over the html can get frustrating....
Donna aka gramme

Forget this...found the answer already post on this form....great site.....Thanks