When attempting to open any attachment on your BlackBerry, you may receive the following error:
“This attachment type cannot be view on your device”
This particular BlackBerry was a on a BlackBerry Enterprise Server.
Connect the BlackBerry to your computer and load Desktop Manager.
Run Application Loader and install the BlackBerry Attachment Service.
If it still doesn’t work (which it didn’t in my case), you will have to wipe out the handheld completely (Options -> Security Options -> General Settings -> Wipe Handheld) and re-activate.
This happened to me recently after loading the 4.6 handheld software, and this service was not installed by default.
Thank YOU, I did the application loader and installed attachment service, it worked!!! Cheers!