Are you opening a csv file? If so then try changing the extension to .txt
and then specify that column as text in the import wizard.

Signature
Regards
Ken....................... Microsoft MVP - Excel
Sys Spec - Win XP Pro / XL 97/00/02/03
----------------------------------------------------------------------------
It's easier to beg forgiveness than ask permission :-)
----------------------------------------------------------------------------
> We always have issues using excel and the excel engine in our programs
> because things like inventory IDs that are entirely numeric are converted
[quoted text clipped - 15 lines]
>
> http://www.microsoft.com/office/community/en-us/default.mspx?mid=5ab1d276-704f-4
c13-ab09-ab1f27247b22&dg=microsoft.public.excel.setup