WPMU DEV SEO activates but cannot access settings page

I activated WPMU DEV SEO in WP MS 3.1.

The network activate seems to have worked, but when i try to go to the settings page I get:

Fatal error: Maximum execution time of 30 seconds exceeded in /home/sbn/public_html/wp-content/plugins/wpmu-dev-seo/wds-files/wds-sitemaps/wds-sitemaps.php on line 379

It seems to be working because in the source of my main site I see this:

<!-- This site is optimized with the WPMU DEV SEO plugin v1.0.3. -->
<meta name="description" content="A Sports Blog Network - blog about baseball, football, basketball, hockey and everything else."/>
<link rel="canonical" target="_blank" href="http://sportsblognet.com/" />
<!-- / WPMU DEV SEO plugin. -->

I have uninstalled and reinstalled the plugin. I don't know what to do next.

Any help?