Without knowing what files you are trying to load/ import, nobody can even begin to take a guess. and then of course the usual - system info, exact version of AE and so on.
As Mylenium says, we need some more information in order to help you. See this page for the kind of information that is helpful: FAQ: What information should I provide when asking a question on this forum?
Are you still facing this problem? If not, let us know how you solved it. If so, please let us know so we can assist you further.