*/
private String step1Login(String username,String password,String ipAddr,String macAddr,String cupSerial){
String requestInfo = VpnXmlParser.createMainAcctRequestInfo(username, password,ipAddr,macAddr,cupSerial);
VpnWebservice vpnService = new VpnWebservice();
try {
return vpnService.validateMainAcctService(requestInfo);
} catch (Exception e) {
logger.error("�������ʺź�������֤ʧ��!",e);
}
return null;
}