[vtkusers] vtkImageActor; Key events

[Michnay Balázs]

Dear all,
I'm using a vtkImageActor object to display an image. What I noticed is 
that it doesn't display images with a width of more than 1024 pixels. 
1024 still works but it won't display an image being 1025 pixels wide. I 
use vtkBMPReader to read the image and the reader works fine, 
because the image can be displayed with a vtkImageViewer. How can I 
make vtkImageActor display higher resolution images?
My other question is about vtkRenderWindowInteractor. Having 
instantiated the class I initialize the interactor but it doesn't catch key 
events. Do I need to do some special settings to make it catch key 
events? Mouse events work, I can rotate, translate, scale without 
problems.
Thanks for you reply,
All the best,
  MB.