SAP Netweaver CE 7.1 Trial -- authentication data for ICM in sapmmc?

After installing SAP Netweaver CE 7.1 Trial all server components can be started successfully.

But when clicking on the ICM globe icon in the SAP Management Console and entering the standard user and password (Administrator/acb123) I just get the following message:

401 Authorization required

--------------------------------------------------------------------------------
Error: -29 
Version: 7010 
Component: HTTP_ADM 
Date/Time: Mon Oct 29 20:41:18 2007  
Module: http_adm.cpp 
Line: 1113 
Server: vmwarexp_CE1_01 
Error Tag: {-} 
Detail: authorization required 

 
 © 2001-2005, SAP AG  

Which authentication data should be used for ICM?

Thanks

DT.