CUPS: Problem sharing USB-Printer (ADDENDUM)

[Roger Grosswiler <roger gwch net>]

I have a PSC750, which is installed locally on a server - ready to
share. I can print locally on the server, but i cannot connet from a
client to this printer. 

Cups replies, that i am not authorized. But i checked, everybody should
be authorized. 

Is there a bug in Cups using USB-Printers? Perhaps a Problem with the
device-URI?

Thanks,
Roger

ADD

Found this in /var/log/messages:

Nov  2 10:32:10 trinity hp: io/hpmud/musb.c 135: unable
get_string_descriptor -1: Operation not permitted Nov  2 10:32:10
trinity hp: io/hpmud/musb.c 1946: invalid product id string ret=-1 Nov
2 10:32:10 trinity hp: io/hpmud/musb.c 135: unable
get_string_descriptor -1: Operation not permitted Nov  2 10:32:10
trinity hp: io/hpmud/musb.c 1951: invalid serial id string ret=-1 Nov
2 10:32:18 trinity python: io/hpmud/musb.c 135: unable
get_string_descriptor -1: Operation not permitted Nov  2 10:32:18
trinity python: io/hpmud/musb.c 1946: invalid product id string ret=-1
Nov  2 10:32:18 trinity python: io/hpmud/musb.c 135: unable
get_string_descriptor -1: Operation not permitted Nov  2 10:32:18
trinity python: io/hpmud/musb.c 1951: invalid serial id string ret=-1
Nov  2 10:35:54 trinity hp: io/hpmud/musb.c 135: unable
get_string_descriptor -1: Operation not permitted Nov  2 10:35:54
trinity hp: io/hpmud/musb.c 1946: invalid product id string ret=-1 Nov
2 10:35:54 trinity hp: io/hpmud/musb.c 135: unable
get_string_descriptor -1: Operation not permitted Nov  2 10:35:54
trinity hp: io/hpmud/musb.c 1951: invalid serial id string ret=-1 Nov
2 10:35:57 trinity python: io/hpmud/musb.c 135: unable
get_string_descriptor -1: Operation not permitted Nov  2 10:35:57
trinity python: io/hpmud/musb.c 1946: invalid product id string ret=-1
Nov  2 10:35:57 trinity python: io/hpmud/musb.c 135: unable
get_string_descriptor -1: Operation not permitted Nov  2 10:35:57
trinity python: io/hpmud/musb.c 1951: invalid serial id string ret=-1