My db ran without any problem in MS Access 2003 and the run-time. A few weeks ago I moved to 2010. The db is still running on my laptop (also as a run-time version .accdr), but as soon as I start it on an other computer with run-time 2010 only it directly returns an on load error. The first thing it has to do is to reconnect the back-end. I've really checked everything within my knowledge and I got the feeling I've read everything on internet about this issue. Maybe one of you can send me in the right direction. Thanks in advance.