Document changing when sent as an attachment

[Kim]

I'm having a problem when I send a document as an
attachment in an e-mail. When I have column formatted
part of the document, it does not go through to the
recipient as columns. The columns have disappeared and
the original formatting has disappeared. We both are
using WORD2000. I have sent my document to myself as well
as another person and there is not a problem. Could there
be some type of default set on the receiving computer?
What can I do to remedy this situation.

Thanks,
Kim