Object won't land on solid object

I'm trying to create a game where objects fall and you have to catch them, but the objects pass through the floor I made and don't bounce off it.

I gave the object the "physics" behavior and the floor has solid. My character can stand and move on it but the object passes through when it falls.

Thanks! <img src="smileys/smiley1.gif" border="0" align="middle" />

Edit:

Problem solved! I gave the floor the physics behavior and set immovable to 'yes'. In case any fellow newbies were wondering.