int colonIndex = proxyServer.indexOf(':');
int proxyPort = Integer.parseInt(proxyServer.substring(colonIndex+1));
String proxyServerName = proxyServer.substring(0,colonIndex);
SPWebdavClient client = new SPWebdavClient();
client.startSession(getHostName(), Integer.parseInt(getHostPort()),
proxyServerName, proxyPort);
webdavClient.setState(new WebdavState());
Credentials credentials = new Credentials(getUserName(), getUserPasswd());
client.setCredentials(credentials);
this.webdavClient = client;
}