Why is error coming up for TinyMce blog editor?

I have installed the开发者_开发问答 TinyMce blog editor to my site. When the compose blog page loads a I get a pop up that has the yield sign and says "Developer Key Validation Failed" Anyone know what this is?

<script type="text/javascript" src="javascripts/jquery/jquery-1.3.2.min.js"></script>
<script type="text/javascript" src="http://www.cysticlife.org/javascripts/jquery/jquery.corners.min.js"></script>
<script type="text/javascript" src="plugins/tinymce/tiny_mce.js"></script>
<script type="text/javascript" src="javascripts/system/config.js"></script>
<script src="http://www.google.com/jsapi?key=YOUR_API_KEY"></script>
<script src="http://gdata-javascript-client.googlecode.com/svn/trunk/samples/blogger/blog_this/blog_this.js"></script>
<div id="blog_this"></div>

---

I think that's a Google Data API error message; if so it's unrelated to TinyMCE. Are you using any Google data in the same page? If so, check your API key.