[Access 2000] Error when importing text files of certain extensions

When running functions in certain forms that do importing or exporting of text files, via the Transfertext command, the following error message occurs:

"Can't update. Database or object is read-only"

This only happens when I import text files that do not have the extensions txt, csv, tab, asc, htm or html. (http://support.microsoft.com/ kbid=247861), including files with no extensions.

I've tried to resolve the problem by editing the relevant registry entries mentioned in the MS support page, but it didn't work. Updating to the latest MS Jet 3.5 service pack didn't work also.

Has anyone encountered the same problem, and managed to resolve it

Many thanks for the help!