It worked!!! thank you so much!!!
I replaced the Microsoft ActiveX Data Objects 2.1 Library reference with Microsoft ActiveX Data Objects 2.8 as recommended in the comment you quoted.

I'm developing an application at home, and I have some problems to make it work in the user's computer.
I'm using access 2003, the default in my computer was to create databases in 2000 format, so I've converted my database to 2002-2003 format (with 'Convert Databases' in 'Database Utilities').
My user has Access 2003 installed in her computer, and she gets a lot of error messages before be able to open it. I've tried to work in her...