RAW data displayed only for 1 hour period.Mounth in settings

Hello.
I've install NFA 6.0Betta.

NFA generates regular reports fine. I can see traffic details for every hour/every day.
But when i select "trouble shooting" i can see only last hour statistics not depending on period i select. E.g. i try to get RAW statistics for last day but it displays like there was no activity whole day except fro last hour.
I've tried to set 1 Month /2Weeks for retaining of RAW data in settings. No help. Graphs with activity for only 1 last hour displayed from RAW data. It's a big problem for me as i can't use regular reports because of large amount of "unaccounted" data (30-50%). How can i fix this? I need RAW data statistics for 1 Month.

NFA 5.5 worked fine at my previous operating system (WinXP). But i can't install NFA 5.5 to my new system with VISTA. Service doesn't start. So i have to use NFA 6.0beta.