hp-setup hangs at startup

Hi,

I am on Fedora 11-i386 with the following version of hplip

hplip-gui-3.9.2-4.fc11.i586
hplip-3.9.2-4.fc11.i586
hplip-libs-3.9.2-4.fc11.i586

When I run hp-setup (as root), it hangs after the copyrights (always)

[root@thinkpad andrea]# hp-setup -g

HP Linux Imaging and Printing System (ver. 3.9.2)
Printer/Fax Setup Utility ver. 8.0

Copyright (c) 2001-9 Hewlett-Packard Development Company, LP
This software comes with ABSOLUTELY NO WARRANTY.
This is free software, and you are welcome to distribute it
under certain conditions. See COPYING file for more details.

hp-setup[3037]: debug: param=

I've run "strace hp-setup" and this is the end of the log

....
stat64("/root/.kde/share/config/kdeglobals", {st_mode=S_IFREG|0600, st_size=117, ...}) = 0
stat64("/root/.kde/share/config/kdeglobals", {st_mode=S_IFREG|0600, st_size=117, ...}) = 0
stat64("/root/.kde/share/config/kdeglobals", {st_mode=S_IFREG|0600, st_size=117, ...}) = 0
fstat64(8, {st_mode=S_IFREG|0600, st_size=117, ...}) = 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0xb7c26000
read(8, "[$Version]\nupdate_info=kwin.upd:k"..., 4096) = 117
read(8, ""..., 4096) = 0
close(8) = 0
munmap(0xb7c26000, 4096) = 0
stat64("/root/.kde/share/config/oxygenrc", 0xbf9345b4) = -1 ENOENT (No such file or directory)
stat64("/etc/kde/oxygenrc", 0xbf9345b4) = -1 ENOENT (No such file or directory)
stat64("/usr/share/kde-settings/kde-profile/default/share/config/oxygenrc", 0xbf9345b4) = -1 ENOENT (No such file or directory)
stat64("/usr/share/config/oxygenrc", 0xbf9345b4) = -1 ENOENT (No such file or directory)
socket(PF_FILE, SOCK_STREAM, 0) = 8
connect(8, {sa_family=AF_FILE, path=@"/tmp/dbus-YMPFCiHxV1"...}, 23) = 0
fcntl64(8, F_GETFL) = 0x2 (flags O_RDWR)
fcntl64(8, F_SETFL, O_RDWR|O_NONBLOCK) = 0
fcntl64(8, F_GETFD) = 0
fcntl64(8, F_SETFD, FD_CLOEXEC) = 0
geteuid32() = 0
rt_sigaction(SIGPIPE, {0x1, [PIPE], SA_RESTART}, {0x1, [], 0}, 8) = 0
poll([{fd=8, events=POLLOUT}], 1, 0) = 1 ([{fd=8, revents=POLLOUT}])
write(8, "\0"..., 1) = 1
write(8, "AUTH EXTERNAL 30\r\n"..., 18) = 18
poll([{fd=8, events=POLLIN}], 1, -1) = 1 ([{fd=8, revents=POLLIN}])
read(8, "OK a16eba9acfc3638eec7139ec4a60df"..., 2048) = 37
poll([{fd=8, events=POLLOUT}], 1, -1) = 1 ([{fd=8, revents=POLLOUT}])
write(8, "BEGIN\r\n"..., 7) = 7
poll([{fd=8, events=POLLIN|POLLOUT}], 1, -1) = 1 ([{fd=8, revents=POLLIN|POLLOUT|POLLHUP}])
read(8, ""..., 2048) = 0
close(8) = 0
futex(0x98c4114, FUTEX_WAIT_PRIVATE, 1, NULL <unfinished ...>

Does anybody have an idea?
If I run the interactive mode, it works.