Piwik not tracking on WP install in subdirectory

I have installed Piwik on my site and it tracks fine at the main domain. However, I have a Wordpress install in a subdirectory and I can’t seem to figure out how to get Piwik to track those pages.

I have installed the Piwik plugin and according to my dashboard, the subdirectory is recognized. I can view the source of any page on the blog and I see the Piwik code in the footer.

Is there anything I can do to further troubleshoot this?

domain that’s working: http://bit.ly/17oQOax
what’s not working: /blog

Sorry, I’d post my actual domain, but it appears a word in the domain is blocked on this forum. :-/

Thanks for the assistance!