Update signing woes

I have done everything to the hilt and no matter what it just keeps saying the update is improperly signed.

ruby "/Users/chend/Documents/sign_update.rb" ~/Desktop/H3NDO_0.6.zip /Users/chend/Documents/dsa_priv.pem

<?xml version="1.0" encoding="utf-8"?>
<rss version="2.0" xmlns:sparkle="http://www.andymatuschak.org/xml-namespaces/sparkle" xmlns:dc="http://purl.org/dc/elements/1.1/">
   <channel>
      <title>H3NDO Changelog</title>
      <link>http://creativemac.org/files/appcasts/H3NDOAppcast.xml</link>
      <description>Updates for H3NDO by CreativeMac.</description>
      <language>en</language>
         <item>
            <title>Version 0.6</title>
      <pubDate>Sun, 01 Feb 2009 11:28:11 +0000</pubDate>
            <enclosure url="http://creativemac.org/files/apps/H3NDO_0.6.zip" sparkle:version="0.6" length="1434453" type="application/octet-stream" sparkle:dsaSignature="MC0CFQCgA+IOnZzHlqgx7mMhlSCuOvyZ7gIUICzI9J2AAgD33gLU1P7YnE6vYfI=" />
            <sparkle:releaseNotesLink>http://creativemac.org/files/appcasts/releaseNotes.html</sparkle:releaseNotesLink>
         </item>
</channel>
</rss>