Moving WordPress Nightmare

I moved a wordpress website from one host to another. I have the xml backup file and access to the old site for a while. From what I understand if it is a straight move, you can just move the files? Does wordpress need to be installed first in the new location?

Here is the site: http://www.motherandchild-edu.org

anywhere you go, it says error estabilishing database connection

there is also this error: Failed loading C:\Inetpub\vhosts\aidright.com\httpdocs\ioncube\ioncube_loader_win_4.4.dll

Help! i need to fix this today.