New-PaNatPolicy doesn't seem to be working..

[Woolersuk]

Hi there,

So I've managed to test a few cmdlets without issue, but this doesn't appear to set anything on the firewall:
PS C:\Users\alexander.woolsey> New-PaNatPolicy -Name "TestNATPol" -SourceZone trust -DestinationZone untrust -SourceTra
nslationType dynamic-ip-and-port -SourceTranslatedAddress ethernet1/3

Name : TestNATPol2
Description :
NatType : ipv4
Tags :
Disabled : False
SourceZone : {trust}
DestinationZone : untrust
DestinationInterface : any
Service : any
SourceAddress : {any}
DestinationAddress : {any}
SourceTranslationType : dynamic-ip-and-port
SourceTranslatedAddress : ethernet1/3
BiDirectional : False
TranslatedDestinationAddress :
TranslatedDestinationPort : 0

I've tried a few different iterations, mainly -SourceTranslatedAddress as an IP or interface - the firewall responds as if all is ok, but the rule doesn't appear.