I don't know why I can't mine... I'm registered at http://top.hashrapid.com/index.php with a miner and I'm trying use cgminer, but when I put url, username and password it closes inmediatly...

What I'm doing wrong? Some tips?

Donations are welcome: Tb3DaSWquXcBQj9NuiJ7FC8N3uVCGFRURU

Thanks a lot!