title: Namespace not bound issue
body: <p>I am new to Spring Integration and XML. I have created the following configuration file:</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:si="http://www.springframework.org/schema/integration"
     xmlns:context="http://www.springframework.org/schema/context"
     xsi:schemaLocation="
  
  http://www.springframework.org/schema/beans
  http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
  http://www.springframework.org/schema/integration
  http://www.springframework.org/schema/integration/spring-integration-2.0.xsd
  http://www.springframework.org/schema/context
  http://www.springframework.org/schema/context/spring-context-3.0.xsd"&gt;
  
  &lt;context:component-scan base-package="com.springProject.app"/&gt;
  &lt;int:channel id="input"/&gt;
  &lt;int:channel id="output"&gt;
      &lt;int:queue capacity="10"/&gt;
  &lt;/int:channel&gt;
  
  
  &lt;int:service-activator input-channel="input"
                         output-channel="output"
                         ref="messageHandler"/&gt;
  &lt;/beans&gt;
  </code></pre>
  
  <p>However the IDE gives me the error, telling me that the "the namespace 'int' is not bound". Does anybody know where the error may be? Thanks in advance!</p>