Report Grouped by Date (CLOSED)

[divined]

Hello everybody

I`m using Crystal Reports 10. Currently, I`m trying to create a simple two table report grouped by Date. Using the Report Wizard I only tell it to use two Descriptive fields from each table and to group them by date.
The grouping does occur, but the dates on which the groupings are based seem to be rather randomly selected, or in a way I can`t understand. How can I tell Crystal Reports to make a group for each day or each month?

thx, in advance

George Papadopoulos