Distribution: Debian Testing

Hardware Environment:
Notebook Compaq 2120EA
iPAQ rx3715 (connected via USB)

Software Environment:
Gnu C                  3.3.5
Gnu make               3.80
binutils               2.15
util-linux             2.12
mount                  2.12
module-init-tools      3.2-pre1
e2fsprogs              1.35
reiserfsprogs          line
reiser4progs           line
pcmcia-cs              3.2.5
PPP                    2.4.3
Linux C Library        2.3.2
Dynamic linker (ldd)   2.3.2
Procps                 3.2.3
Net-tools              1.60
Kbd                    [opzione...]
Console-tools          0.2.3
Sh-utils               5.2.1
udev                   056
Modules Loaded         cifs rfcomm l2cap bluetooth pcmcia lp binfmt_misc 8250_pnp parport_pc parport 
iptable_filter ip_tables ppp_async ppp_generic slhc crc_ccitt ipaq usbserial natsemi alim15x3 ohci1394 
ieee1394 yenta_socket rsrc_nonstatic pcmcia_core hsfmc97ali hsfserial hsfengine hsfosspec hsfsoar 
8250_pci 8250 serial_core snd_ali5451 snd_ac97_codec nls_iso8859_1 nls_cp437 vfat fat sg sr_mod 
ide_scsi evdev usbhid

Problem Description:
When I try to connect my iPAQ rx3715 to my PC for synchronization, I obtain the following error from the 
ipaq kernel driver:
usb 1-1: new full speed USB device using ohci_hcd and address 5
ipaq 1-1:2.0: PocketPC PDA converter detected
drivers/usb/serial/ipaq.c: active config #2 != 1 ??
ipaq: probe of 1-1:2.0 failed with error -5

Steps to reproduce:
Just connect an iPAQ rx3715 to a PC via USB cable.