EPM Generating Files Phone Doesn't Like

I’m seeing some odd provisioning issues.

PBX Firmware: 3.211.63-10
Polycom SPIP 335 phones running 4.0.2.11307.

The phone is requesting 000000000000.cfg and {MAC}.cfg, but is ignoring the sip.cfg and {MAC}_reg.cfg specified in the MAC.cfg.

Thoughts?