[CentOS] OKI B411 printer

On a Centos-5.7 system, this printer works fine using a parallel cable
but fails using the USB interface; the following appears on the CUPS
page when I try to print a page:

Unable to open device
"hal:///org/freedesktop/Hal/devices/usb_device_6bc_268_AK11044671_if0_printer_no
serial":
Permission denied"

Any suggestions? On a Fedora 14 system, the USB interface works, so it's
not the printer.  I've also tried another USB jack.

Bob T.