Dtrace: Module is no longer loaded

Hi,

I am running FreeBSD current on RouterStation Pro (Mips) using nfs. I
followed the handbook about how to compile for Dtrace support. and
kldload dtraceall succeeded.

But when I tried to run:
dtrace -n 'syscall:::'

I got error message saying:
'dtrace: invalid probe specifier syscall::::
"/usr/lib/dtrace/psinfo.d", line 88: failed to resolve type
kernel`struct thread * for identifier curthread: Module is no longer
loaded'

I even tried to run some scripts I found here
http://wiki.freebsd.org/DTrace/Examples but got same error.

What am I missing?

kldstat shows:
Id Refs Address    Size     Name
 1   24 0x80050000 64fc60   kernel
10    1 0xcdd9b000 a03      dtraceall.ko
11    1 0xce2b2000 54d3     profile.ko
12   10 0xce2b8000 4621     opensolaris.ko
13    3 0xce2bd000 4a3c     cyclic.ko
14    8 0xce2c2000 138cfc   dtrace.ko
15    1 0xce3fb000 15ff4    systrace.ko
16    1 0xce411000 4a95     sdt.ko
17    1 0xce416000 4c2b     lockstat.ko
18    1 0xce41b000 54f0     dtnfsclient.ko
19    1 0xce421000 49d7     dtmalloc.ko
20    1 0xce426000 49e1     dtio.ko


uname -a:
FreeBSD MESHGATE-12 10.0-CURRENT FreeBSD 10.0-CURRENT #7: Fri Oct 26
13:20:29 CEST 2012
root_at_challenger:/usr/obj/mips.mips/usr/src/sys/RSPRO_NFS  mips

FreeBSD head r238604.

thank you,

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