Issues trying to log onto first time screen

I am a newbie trying out airtime after playing with some windows based schedulers, and when I installed it first time I had issues so have done a complete dump and reinstall of airtime 2.1.3 but having issues with the first time admin screen as defaults are showing to be wrong (user Admin password admin) and has been challenging me with captiva. this is a local installed copy however the unit is on the net. Using xubuntu 12.04.1 (ubuntu with xfce interface). Thanks for any help as I'm a real newbie at this one