That's not the case with CS5 or CS5.5. If you installed Acrobat X Pro as part of the Creative Suite installation then it's a Technical Support issue and you should call Adobe about it. If you installed it separately outside the Creative Suite then you need to go back and install it as part of the Creative Suite.
Thank you! I had some trouble finding the right number to call in my country but the issue has now been solved. It was that Acrobat automatically adjusts to the language of the computer system and that differed from the language I had purchased Acrobat in.