VirtualBox unable to start guests

[Denny Lin]

Hi,

I installed VirtualBox 4.2.12 on 10-CURRENT amd64 (default options
except NLS is disabled). Guests won't start even though vboxdrv.ko has
been loaded. I've tried both FreeBSD 9.1 and MINIX.

The error log shows:
00:00:12.519373 AssertLogRel /tmpfs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-4.2.12/src/VBox/HostDrivers/Support/SUPLib.cpp(1726) int supLoadModuleResolveImport(RTLDRMODINTERNAL*, const char*, const char*, unsigned int, RTUINTPTR*, void*): <NULL>
00:00:12.519380 VMMR0.r0 is importing SUPSemEventSignal which we couldn't find
00:00:12.519652 pdmR3LoadR0U: pszName="VMMR0.r0" rc=VERR_SYMBOL_NOT_FOUND szErr="supLoadModule returned VERR_SYMBOL_NOT_FOUND"
00:00:12.519663 VMSetError: /tmpfs/usr/ports/emulators/virtualbox-ose/work/VirtualBox-4.2.12/src/VBox/VMM/VMMR3/VM.cpp(602) int vmR3CreateU(UVM*, uint32_t, int (*)(VM*, void*), void*); rc=VERR_SYMBOL_NOT_FOUND
00:00:12.519667 VMSetError: Failed to load VMMR0.r0
00:00:12.519749 ERROR [COM]: aRC=NS_ERROR_FAILURE (0x80004005) aIID={db7ab4ca-2a3f-4183-9243-c1208da92392} aComponent={Console} aText={Failed to load VMMR0.r0 (VERR_SYMBOL_NOT_FOUND)}, preserve=false
00:00:12.520097 Using XKB for keycode to scan code conversion
00:00:12.526110 Power up failed (vrc=VERR_SYMBOL_NOT_FOUND, rc=NS_ERROR_FAILURE (0X80004005))

Any help would be greatly appreciated.

-- 
Denny Lin