pane_combobox change panelevel

Hi,

i create a form with 3 folders (=3panelevel).

In panelevel=1 there are a pane_combobox filled with different values, but when i click on this item the system switch to panelevel=2. After mouse clicking on this item my folder1 looks like folder 2.

Does anyone got an idea whats going wrong ??

thanks

Markus

(SBO 2004, SP00 PL20)