title: Failed build while collecting changes from other repository
body: <p>Getting the following error while trying to do checkout</p>
  
  <p>Build errors
  #</p>
  
  <pre><code>[11:27:20]Failed to start build
  [11:27:20]Failed to collect changes, error: Error collecting changes for VCS repository 'ibtis' org.tmatesoft.svn.core.SVNException: svn: E175002: Externals problem: processExternalsChanges, externals URL: http://server1/svn/ibtis/trunk/UserControls, version: -1, path:UserControls, original error: svn: E175002: unknown host svn: E175002: OPTIONS request failed on '/svn/ibtis/trunk/UserControls' svn: E175002: unknown host svn: E175002: OPTIONS request failed on '/svn/ibtis/trunk/UserControls'
  </code></pre>
  
  <p>In teamcity current svn url is URL: <a href="http://server2/svn/ibtis/trunk" rel="noreferrer">http://server2/svn/ibtis/trunk</a> and basically it copies changes from other <a href="http://server1/svn/ibtis/trunk" rel="noreferrer">http://server1/svn/ibtis/trunk</a>.</p>
  
  <p>Any idea whats going wrong here. What setting I am giving wrong or is it not possible to do it from teamcity. </p>