Usage of Imported Archive in Userdefined Function

Hello,

I have a userdefined function which needs external classes. The jar-file with these classes is imported as an Imported Archive. When I doubleclick it, it shows me the name and the path (eg. org/abc/xyz).

In my userdefined function I enter in the 'Imports'-field: org.abc.xyz.*

Unfortunatly it's not working. What did I miss?

Thank you for any hints.

Regards,

Markus