Using Maven behind proxy

I'm trying to add a Maven library to Java/Scala project. Search works fine but after that I get a message that "No files were downloaded". Here's the ~/.m2/settings.xml

<settings xmlns="http://maven.apache.org/SETTINGS/1.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/SETTINGS/1.0.0http://maven.apache.org/xsd/settings-1.0.0.xsd">
  <localRepository/>
  <interactiveMode/>
  <usePluginRegistry/>
  <offline/>
  <pluginGroups/>
  <servers/>
  <mirrors/>
  <proxies>
    <proxy>
      <id>local</id>
      <active>true</active>
      <protocol>http</protocol>
      <host>localhost</host>
      <port>3128</port>
    </proxy>
  <profiles/>
  <activeProfiles/>
</settings>