I have an OES Linux server with iPrint.

I installed multiple iPrint printers. For some printers, users are always
asking for there authentication wich always fails. iPrint always ask for
there username and password and for other printers, printing is OK.

I use secured printers and the group those users are members of is in the
users section for those printers.

I use Contextless login.

I have iPrint client 4.20 and Netware client 4.91 SP2.

How can I resolve this problem so my users can print to thoses printers
without asking for there username and password ?