can't build kernel with FAST_IPSEC R5.2.1

[bohn_michael at tiscalie.de]

Hi all,
I want to use my soekris VPN1401 and try to build a new kernel with  FAST_IPSEC 
but when I try to build an kernel FAST_IPSEC option the make build stops without 
is works fine.

see log :

pcomp.o(.text+0x8a4): undefined reference to `crypto_freereq'
xform_ipcomp.o(.text+0x93e): undefined reference to `crypto_dispatch'
xform_ipcomp.o: In function `ipcomp_output_cb':
xform_ipcomp.o(.text+0xa85): undefined reference to `crypto_dispatch'
xform_ipcomp.o(.text+0xbb4): undefined reference to `M_XDATA'
xform_ipcomp.o(.text+0xbc4): undefined reference to `crypto_freereq'
xform_ipcomp.o(.text+0xc88): undefined reference to `M_XDATA'
xform_ipcomp.o(.text+0xc98): undefined reference to `crypto_freereq'
*** Error code 1
 
Stop in /usr/obj/usr/src/sys/new.
*** Error code 1
 
Stop in /usr/src.
*** Error code 1
 
Stop in /usr/src.
lisa# uname -a
FreeBSD lisa.home.inet 5.2.1-RELEASE-p5 FreeBSD 5.2.1-RELEASE-p5 #10: Thu Apr 22 13:58:30 CEST 2004     root at lisa.home.inet:/usr/obj/usr/src/sys/new  i386
lisa#

Is there anybody who could help me to fix my problem 


Thanks !!!!!


Michael