FreePBX 13.0.188.3 and Cisco SPA525G Registration failed.

So im testing out FreePBX and following louis's guide on youtube. But have ran into a bit of a problem. where my phone Cisco SPA525G is failing to register with the PBX and I cant figure out why. Any help would be great. I have the PBX set with a static IP and the phones proxy set to that IP.
 
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