Failure to build FreeBSD 9.2

Sat Oct 5 06:40:33 UTC 2013

i recompiled my kernel with more verbose output and I see following errors
before it stops:

procfs registered
panic: No usable event timer found!
cpuid=0
KDB: stack backtrace:
db_trace_self_wrapper() at db_trace_self_wrapper+0x2a ....
panic() at panic+0x1d8/frame ....
initclocks() ....
mi_startup() ....
btext() ...
KDB: enter: panic
[thread pid 0 tid 100000]
Stopped at kdb_enter+0x3b: moxq

can someone help me to explain what this means and what to do next?