In order to use my printer I just bought an USB to parallel connector. Whereas 
it works perfectly under Linux I am not able to print under FreeBSD.
When I plug the USB connecter to my computer and set the ulpt debug level to 
15, I can read:

ugen2.4: <Prlific Technology Inc.> at usbus2
ulpt_attach: sc=0xfffffe0007f4fe00
ulpt0: <Prlific Technology Inc. IEEE-1284 Controller, class 0/0, rev 1.00/2.00, 
addr 4> on usbus2
ulpt_attach: setting alternate config number: 1
ulpt0: using bi-directional mode
ulpt_status_callback: error=USB_ERR_STALLED

The last message repeats indefinitely while the connecter is plugged in.

When I try to read or write the /dev/ulpt0 it hangs..

About the usb to parallel cable it is an USB1 device:
ugen2.4: <IEEE-1284 Controller Prlific Technology Inc.> at usbus2, cfg=0 
md=HOST spd=FULL (12Mbps) pwr=ON (100mA)

My FreeBSD version is 9.2:
FreeBSD paris 9.2-RELEASE FreeBSD 9.2-RELEASE #0 r255898: Thu Sep 26 22:50:31 
UTC 2013     r...@bake.isc.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64

I found that in 2009 someone got the same problem and a patch was proposed but 
its URL is no more available:

Please can you help me?
Thank you in advance.

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