You don't seem to understand; the UBB is detecting that your server value is low, too low to write all of the configuration values in one stream for all of the forums you have. The effect here is to make your server not write a 0 byte configuration (clearing out your configuration when you make changes) as the server is currently configured to only allow a small value.
Again, this is reporting that YOUR SERVER (not UBB.threads) has a low value... The goal is to have your host increase any low values, the
System Requirements Test tool will report any other values that may need changed as well; most shared hosts will not allow users to make server level configuration changes.
