OES 2 iPrint

We get an error when creating a driver profile for the HP 4350 and the HP 2550. In iManager we get this error:

Request (CLIENT_ERROR) - bad status code (0x406)
IPP Error: 0x406

In ndpsmmon.log we see:

02/12/2008 10:39:02 AM, Operation Create Object:,
Error: 506D000C - object not found,
User Name, XXX.CONTEXT,
Address, IP-address,
Object Name: unknown
(Client Interface)

What could this be?

Kind regards,
Rutger