Good question. It's been a LONG time since I used Access.
Lol, I googled it and came across you asking the question. From other things I found on Google, it looks like Access uses UTF(-8?).
Do you know if the iso-8859-1 charset has all of the Danish characters you need?
Also, how are you outputting the database content? I've had problems in the past where it wasn't the database that was having issues, but the function I was using to output the code. Double-check your functions and make sure they don't specify a charset anywhere.