Select Attribute shows now attributes

I have create a small Rapid Miner process which imports a csv file, add a new (computed) variable, adds a role (label), converts a numerical value to a binomiial, and the I want to select some attributes for a Neural Net. For what ver reasons I do not get any attributes in the drop box vor the Select Attributes (subset, just empty when I open the Selecte Attributes... dialogue.

Very curious as I have othe processes where this works and csv import is done identically.

Imgae:
Process: http://www.heartsome.de/extimg/neuralnet100.rmp

Any idea what I could do wrong?

Klemens