beginers rss problem

I am new to this and have been trying now for a while to get a feed wiget on my side bar but ever time I drag it
to the side bar and then check my blog I find that either
everything on my side bar has dissapeared or as with the last time I tried the title of my post moved to the right and ended up on the sidebar. I’m sure I doing something
silly but if anyone can help I would be grateful.