I'd have to assume you're using "http://localhost" for the SWF's rather than the actual domain/IP address of your server. Try that, the IP address of the server may also help us help you!
I would have to go with hostingaddicts.com if I was in your shoes. They have been fantastic and we have a few dedicated servers with them. The support is great, and if you contact the sales department they might be able to do better on the price. Anyways, here is a thread we found about some...
I encountered one of our players getting into our database through this CMS and deleting the "Users" table. Do you have any exploit fixes which will resolve some known exploits?
Thank you.