Initial values for multiline element in container on CRM3.0

[Karsten Ernst]

Hi all,
how do I maintain the initial value for a multiline import element in a
container? I can't just insert the data as I do with regular elements.
The same problem occurs with the test enviroment (tcode swus). I can't
insert any value in the multiline import value.
 
I hope anyone has an idea.
 
Thanks in advance,
 
Karsten