I have gone ahead and run the following command for you as the root user on your server:
<p class="code_block" style="width: 200px;">mysqladmin flush-hosts</p>
In order to run this yourself you would need root access to your server, which is explained in detail in our guide on <a href="http://www.inmotionhosting.com/support/edu/whm/into-to-web-hosting/standard-vs-root-access" target="_blank">standard SSH access vs root access</a>.
Please let us know if you're still experiencing any issues at all.
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