Yes, but not in the way you've set in up, both report and data.
This article explains databasenormalization terminology for beginners and how you've to organize the data in a database, because what you've done, is how you would do it in Excel and that is quiet different in a database. http://support.microsoft.com/kb/283878
The fields Datenv_1 to Datenv_3 and Datert_1 to Datert_3 should be taken out of the table Dossier and into a new table, with 3 fields.
I've made temporary solution until you get a grip on your data and tables.