Adding Bluetooth to FreeNAS is causing the kernel to panic

I am attempting to add Bluetooth support to the FreeNAS kernel but this does not seem to work as expected.

Hardware:
Belkin Bluetooth Adapter (I have tested this against a FreeBSD system and have been able to load the bluetooth stack for it and use it just fine.)

Steps followed:
1. Modified FREENAS.amd64 to include the options for ng_ubt to be part of the kernel
2. Modified os-base to comment out the Without BLUETOOTH line
3. Built the code and installed on separate machine
4. Ran kldload...

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