title: Failed to execute goal org.apache.maven.plugins:maven-release-plugin; Unable to tag SCM
body: <p>I'm using the <code>maven-release-plugin</code> to prepare releases for my project.</p>
  
  <p>I added the plugin like this:</p>
  
  <pre><code>    &lt;plugin&gt;
              &lt;groupId&gt;org.apache.maven.plugins&lt;/groupId&gt;
              &lt;artifactId&gt;maven-release-plugin&lt;/artifactId&gt;
              &lt;version&gt;2.5.3&lt;/version&gt;
      &lt;/plugin&gt;
  </code></pre>
  
  <p>And the Git repo is set up like this:</p>
  
  <pre><code>  &lt;scm&gt;
      &lt;url&gt;http://my-repo.com:7990/projects/repos/my-project&lt;/url&gt;
      &lt;connection&gt;scm:git:ssh://git@my-repo.com:7999/wrap/my-project.git&lt;/connection&gt;
      &lt;developerConnection&gt;scm:git:ssh://git@my-repo.com:7999/wrap/my-project.git&lt;/developerConnection&gt;
      &lt;tag&gt;my-project-1.1&lt;/tag&gt;
    &lt;/scm&gt;
  </code></pre>
  
  <p>However, when I am running this:</p>
  
  <pre><code>  mvn release:prepare
  </code></pre>
  
  <p>I am getting this error:</p>
  
  <pre><code>[ERROR] Failed to execute goal org.apache.maven.plugins:maven-release-plugin:2.5.3:prepare (default-cli) on project my-project: Unable to tag SCM
  [ERROR] Provider message:
  [ERROR] The git-push command failed.
  [ERROR] Command output:
  [ERROR] Permission denied (publickey).
  [ERROR] fatal: Could not read from remote repository.
  [ERROR] 
  [ERROR] Please make sure you have the correct access rights
  [ERROR] and the repository exists.
  </code></pre>