ulpt.c v.1.68 doesn't work in 6.0-STABLE (RELENG_6)

[Alex Pivovarov]

originaly 6.0-STABLE has ulpt.c v.1.66
to fix bug described in PR 88886 I downloaded new version of this file (v.1.68)
PR 88886 - http://www.freebsd.org/cgi/query-pr.cgi?pr=88886
cvsweb ulpt0  - http://www.freebsd.org/cgi/cvsweb.cgi/src/sys/dev/usb/ulpt.c

I replaced old /sys/dev/usb/ulpt.c (v.1.66) on new version (v.1.68) and typed
#make buildkernel
#make instalkerne
#reboot

but now if I run

# cat /dev/ulpt0

my computer halts and there is not even panic or fatal trap or
rebooting. Computer just halts.

P.S. if I edit ulpt.c v.1.66 and patch it by hand as described in PR
88886 - everything works fine.

my usb printer is HP LaserJet 1010.

P.P.S
uname -a
FreeBSD st1.fqdn 6.0-STABLE FreeBSD 6.0-STABLE #2: Mon Nov 14 17:25:53
MSK 2005     root at st1.fqdn:/usr/obj/usr/src/sys/st1  i386