Changing blog location without breaking the internet

Hi,

Here’s a little background first:

I have my main domain – oliverhaslam.com – pointing to oliverhaslam.dyndns.org because my IP may change. The dyndns URL obviously points to the IP of my home server which is running WordPress.

I’ve installed everything and it works fairly well. The one problem I have now is that all links/images are pointing to urls that begin with the dyndns url, where I want to hide that completely and use the oliverhaslam url.

I thought that changing the ‘WordPress Address’ and WordPress Site’ urls would do the trick, but that killed everything and I had to edit the wp-config file to get everything back up.

So, my question is: what did I do wrong, and how do I get where I want to be?

Hope that all makes sense!

Cheers.