Changed DNS

I have a question and I think it is similar to this post...
http://www.interactivetools.com/iforum/Products_C2/CMS_Builder_F35/gforum.cgi?post=61444;search_string=change%20domains;guest=60186647&t=search_engine#61444
which I've read but still can't figure out. I have a hosting account that was under idsitepreview.com, I changed the hosting account to my other domain greenwaysrealestateandauction.com. Now all the records in the database are still pointing to idsitepreview.com.....here's an example....http://www.greenwaysrealestateandauction.com/listingList.php
When you hover over the image of the property you can see the idsitepreview link still there. What do I need to do to get this to link to greenwaysrealestateandaucion? I am looking into the database, but not real sure what I need to do. Thanks for any help.