Blank Acrobat with blank Errormsg in PDF-Preview

Hi all,

i am starting to use Adobe LiveCycle Designer ES Version 8.2.1.3144.1.471865 and Adobe Acrobat 9 Pro Version 9.0.0.

Any File i like to see a preview in LiveCycle Designer only shows an Acrobat window with blank screen and blank Errorwindow like

http://berlau.de/AdobeError.png

Some times i have the same problem with my FireFox. But after Restart of FireFox all is running well for some days.

At LD i can start it or reboot the computer as often as i like to do but the problem is still the same.

Any idea?

Regards

Ralf...