cant filter on dates

hey,
When i go to preferences and try to filter on a date (specific date or since a date) it doesnt work. When i go back to general tab nothing is changed and when i go back to preferences tab the "All Dates" option is selected.
I use windows xp SP3, my regional settings are set to belgium and in pokertracker i have selected "no, never change my regional settings".
I hope i gave u enough information.
When i go to preferences and try to filter on a date (specific date or since a date) it doesnt work. When i go back to general tab nothing is changed and when i go back to preferences tab the "All Dates" option is selected.
I use windows xp SP3, my regional settings are set to belgium and in pokertracker i have selected "no, never change my regional settings".
I hope i gave u enough information.