No, mixing or not mixing SQL-join syntax did not change anything.

Please anybody, can someone give me a hint where to look why the
selection in the lookup combo box doesnt work for one field, while it
works ok for another?

See my previous post for details. I have checked the obvious things
(yes, the column is editable - I can edit with an edit box) and am
running out of ideas now.

HELP please.

Mirco