We ve the following problem with the authentication context

We ve configured the authentication context for several OU's. For some
ou's it isn't working

When they login within the Bordermanager webpage they get the
message "login failed, please try again"

-all context notations are the same within the conf-page. (nwadmin)
-the tree-name is correct.

There is now difference when they choose their context in place of the
default option.

How can i fix it?