I am NOT a computer geek

I am, ahem, computer challenged. I have a problem with OpenOffice.org Writer. Let me see if I can explain. I was attempting to use "*******" to separate a bit of text from another and before I knew it I had this bold black double line that replicated itself whenever I start a new paragraph. How the F**K! do I get rid of it???? Help. Anyone? Anyone?

Or am I gonna have to debase myself on the OpenOffice website as a total non-computer geek?