Vincent,
That was a good tip! I did not write "FILEDSN=" before and when I did it worked.
But still on the client it says 'Can't find the datasource...'

The searchpath (DataPath) is K:\Korallbas\korall\ultra\Data1 and maybe I have to put it in another way with servername or something.
In this case I do not get the opurtunity to point to a datasource. It just stops.