title: No declaration can be found for element 'context:component-scan'
body: <p>i'm starting with Spring 3 (3.1.2) and Google App Engine.</p>
  
  <p>I've followed a tutoria online, now, i've my bean-realted xml which has a problem while starting.</p>
  
  <p>this is the code</p>
  
  <pre><code>&lt;?xml version="1.0" encoding="UTF-8"?&gt;
  &lt;beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xmlns:context="http://www.springframework.org/schema/context"
  xsi:schemaLocation="http://www.springframework.org/schema/beans 
  http://www.springframework.org/schema/beans/spring-beans.xsd
  http://www.springframework.org/schema/context/
  http://www.springframework.org/schema/context/spring-context.xsd"&gt;
  &lt;context:component-scan base-package="my.example"&gt;
  </code></pre>
  
  <p>where the root package of all the java file is "my.example". The subpackage are "model" and "controller" with subpackages as well.
  now.</p>
  
  <p>when i start the app i receive back this error:</p>
  
  <pre><code>org.springframework.beans.factory.xml.XmlBeanDefinitionStoreException: Line 10 in XML document from ServletContext resource [/WEB-INF/spring-servlet.xml] is invalid; nested exception is org.xml.sax.SAXParseException: cvc-complex-type.2.4.c: The matching wildcard is strict, but no declaration can be found for element 'context:component-scan'.
  </code></pre>
  
  <p>with a lot of more stacktrace.</p>
  
  <p>does anyone know how i can solve this?
  i checked the XSD and they seems to be correct. </p>