Embedding soundcloud tracks

I'm trying to post some of my tracks here but it looks like the code isn't working. I tried both using the "code" option up top and just pasting the code right here, but neither option seems to work. Any ideas?

You don't need HTML/Code embed data here, you can simply paste the URL into your post or signature.

such as http ://soundcloud.com/jsmcpn/MyNewSongForWATMM (but without the space I put between http and :// )

thx much!!!