SubReport only once indicate

[lutzs]

Hi,

i have a .net application with a crystal report.
There is one table dtt with this fields:
- customerID
- securities
- securitie_text
- others
- ID

The structure of the table is this for example:
customerID securities securtie_text others ID
1 55896 Aktie Prima -- SEC
1 89634 Aktie Super -- SEC
1 -- -- textblabla O
1 -- -- anothertext O
2 77315 Aktie Besser -- SEC
2 -- -- hierstehttext O

Now, i will represent the table with crystal reports.
I grouped the report by customerID.
Now I insert a subreport "securities" in Detail a.
I see the securites and securitie_text for each customer with ID = SEC (SELECT- Expert).
The problem is: There are 2 entries for customerID 1.
The subreport is also two times indicated.
How can I employ it that the subreport "securities" is only once indicated?

Thanks, Stephanie