End of Recordset???????????

[Emmanuelle]

It is me again!
I don't know what I have done with one of my form, but when I want to add a new record I have the following message:
You can't go to the specified record, you might be at the end of the recordset.
Previously it did work perfectly, any ideas what I might have done and especially what I should do?

thanks
one day maybe I will understand Access!!