Just looked at your site. Considering that you have 12 pages worth of Active Topics in the last 24 hours indicates a very active forum.

Perhaps Rick was being really lenient and letting your site use up a lot of resources as he might not of had too many sites running on the server.

Now that there is a new owner, it just might be that they are only enforcing a normal resource limit and you are hitting your head against it from time to time.