You must correctly set attributions for your theme. Every page of your theme needs to have hyperlinks to the author of theme and to OpenWack.org, preferably in the bottom and without rel=“nofollow” attribute.
Example:
Theme design by <a href="mysite.com" title="Your title">My Company</a>. Powered by <a href="http://www.openwack.org/" title="OpenWack Community Software">OpenWack</a>.
Also, you can use linked images for both links instead of text, like this:
<a href="http://www.openwack.org/" title="OpenWack Community Software"> <img src="http://static.openwack.org/powered-by-openwack.png" alt="Powered by OpenWack" /> </a>