in our web design forum, but as you're here now we'll try to sort this out.
1. You say you have registered a domain name - is it being hosted by the company which registered it for you, or is it 'parked' with them?
2. You say you have a page in a networking site - what exactly does that mean? Are you saying that someone else has published a web site, and you have your own private page on it? If you are, you can't link your own domain name to it - the page address will be at the domain name for the site you refer to. Let's say the site is called w w w. networking.com and your page is called johnb9
The address of your page would be
w w w.networking.com/johnb9
(I've inserted spaces between the w's in my illustration to stop our site automatically creating a 'click here' hyperlink)
I'm really foxed by your comment that you want a link to work "when someone clicks on it (via advert in a newspaper)" What does that mean? Hyperlinks only work on web pages, not newspapers.
If you can explain what you are trying to do in a little more detail I'll answer your question, but at the moment I'm afraid I can't begin to understand.