"Could not find installable ISAM"

All of a sudden I get this error message when trying to import a txt file into an existing Access table. I've done it many times before. I can also do it on another computer with the same files and version of MS Office Professional 2002 and it works.
Also does anyone know how I can get a CD of SP-3 for Office as it will take me 12 hours to download it on my dialup and my ISP kicks me off before that. It's over 55 meg. This doesn't affect the above error as the other computer it works on isn't updated yet either.
Would appreciate any help you can give.
Floyd

 

For the error message, see if the information in the Microsoft Knowledge Base article, You receive a "Could not find installable ISAM" error message or some file types are missing when you import files, export files, or link files in Access 2000 is any help.

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