For immediate updating msaccess data in a multi user  there is a method
called engine.idle with the argument dbrefreshCache.
This works well by using it in a msaccess application.
If I use that method in vb (with linked jet engine tables) there is no
performance increasing for a multi user environment.  Why that (the method
is also supported in vb).

Can somebody help me to solve my problem

Best Regards
Thomas