[jsterling]

And your servers are hosted with nfoservers?

If so I had a similar issue setting up sourcebans myself. Since their machines host multiple servers they told me that the MySQL connection out of their servers could be using any IP on the machine. Make sure that you use a wildcard in your allowed host section. It should tell you what the wildcard is on the screen.

An example would be xxx.xxx.xxx.%

% being the wildcard but yours may be different.