OER master active-probe

Experts,

I am running through a lab on OER. When I look at the sh oer master
active-probe output on my rack I see:

----
R6#sh oer master active-probes
        OER Master Controller active-probes
Border   = Border Router running this Probe
State    = Un/Assigned to a Prefix
Prefix   = Probe is assigned to this Prefix
Type     = Probe Type
Target   = Target Address
TPort    = Target Port
How      = Was the probe Learned or Configured
N - Not applicable
The following Probes exist:
State      Prefix             Type     Target          TPort   How     Codec
Unassigned                    echo     3.3.3.3             N  Cfgd         N
The following Probes are running:
Border          State    Prefix             Type     Target          TPort
----
When I look at answer key it shows:
---
        OER Master Controller active-probes
Border   = Border Router running this Probe
= Probe is assigned to this Prefix
State    = Un/Assigned to a Prefix
Prefix
Type     = Probe Type
Target   = Target Address
TPort    = Target Port
llowing Probes exist:
tate      Prefix
S
How      = Was the probe Learned or Configured
N - Not applicable
The
f
o       Type     Target          TPort How
Assigned   3.3.3.3/32         echo     3.3.3.3             N Cfgd
The following Probes are running:
Border          State    Prefix             Type     Target          TPo
r1.1.1.6         ACTIVE   3.3.3.3/32         echo     3.3.3.3             N
----
Any ideas why my state is unassigned? Here is configuration from router
R6#sh run | b ^oer
oer master
 policy-rules prfx
 logging
 !
 border 1.1.1.6 key-chain OER
  interface Serial0/0/0.62 external
  interface FastEthernet0/1 external
  interface FastEthernet0/0 internal
 !
 learn
  delay
  periodic-interval 3
  monitor-period 1
 no max range receive
 mode route control
 mode monitor active
 !
 active-probe echo 3.3.3.3
!
oer border
 logging
 local FastEthernet0/0
 master 1.1.1.6 key-chain OER
!
ip prefix-list prfx seq 5 permit 3.3.3.3/32
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