This is Access 97 !
It is in use by a customer of mine. Sadly the designer is now dead.
However I am hoping that the issue might be common to later versions.
The database has been working but now only the first record is editable.
I have run Compact, then repair several times.
The compact reduced the file from about 50Mb to 2 so that worked but it has not solved the problem.
I hope someone can assist as I do not know Access very well
Ian