Backspace does not work within editor-widget

[moveIT]

Environment: Progress 9.1D07, Windows XPSP2!

I have a SmartDataView with some Fill-In´s, a richtx32.ocx and an editable editor placed on it! Data is provided by a SmartBusinessObject!
My problem is that within this editable editor the backspace does not work, nothing happens! The letter before the cursor is not deleted. Also Enter does not work! All others keys work! What can be the problem!
Within other editors with the same properties this keys work as you are used to it! I don´t understand this!
Can anyone help me! Thanks!

 

[BONO]

And u have no trigger like :
on return of <frame-name> Anywhere do: end ?

 

[moveIT]

Editor has no triggers defined!

No, I have no trigger defined!