The message: 06/09/2003 12:49:39: (I) Opened session for 'CN=System Administrator/O=System' '127.0.0.1' (SYSTEM - pmaSystem)
indicates that you did actually log in. My guess is that server did not recognise you because your browser does not accept cookies. Puakma uses a server generated session cookie to keep track of user sessions.
At the console you can type "tell http debug on" to show the data being sent to/from the browser.