I will try my best to explain what happened:

1. I have my elgg community as a sub-doman (Example: www.elggsocial.XXXXX.com)
2. My main domain has a script that required a PHP 5.3 in order for it to run properly
3. My hosting company moved my shared hosting plan over to another server and updated it to PHP 5.3. Now the script runs fine on my main domain.
4. However, my elgg community (Example: www.elggsocial.XXXX.com) will not allow me to log into my account.
5. My hosting company said that everything went fine and the database was working fine on the new server and the new DNS was pointing to the right domain.
6. So when I try to log in, this is what I get: "Sorry, logging in from a different domain is not permitted. Please try again."

Any ideas on what happened and how to fix this problem?

Thanks!