Many ceiling roses from a DIY store include a wiring diagram. There are
also DIY books on the subject. Studying the diagram should make it obvious
what you've done which is about the most common mistake people make when
first playing around with electricity.
*Procrastination is the art of keeping up with yesterday.

Dave Plowman London SW 12
RIP Acorn

Or have a look a nice web page such as

http://www.userview.net/loop1.html

Adam