Hyper-V Replica Capacity Planner stuck getting VM information

I'm trying to use the Capacity Planner for Hyper-V replica tool to estimate requirements for a replica site.
It keeps getting stuck "Getting the VM and VHD from primary site, this can take upto several minutes...". I've waited over an hour, and it still sits there.
The primary site is a 3 node Hyper-V 2012R2 cluster. I have installed and configured the Hyper-V Replication Broker role on the cluster. For now, it's set to use HTTP without any certificates.
I don't have a replica site yet, so I've selected "Skip tests involving Replica site". For the primary site, I've tried pointing it at both the replication broker, and at one of the individual nodes. It gets stuck in the same place.
Other things I've tried:
Disabled windows firewall on all 3 nodes
Running the tool from one of the nodes, logged in as a domain admin account
Moving all the VMs off of one node, and pointing the tool at that now empty node
Let it run for longer - left it alone overnight.
Downloaded the tool again in case it was corrupt
Rebooted my computer
In all cases, it gets stuck at the exact same spot.
Any idea how to figure out why it is freezing? Have I missed configuring something important for the tool to run?

Hi Grant,
Thanks for your reply.
The tool and documentation have been updated for Windows Server 2012 R2
and can be download from here:
http://www.microsoft.com/en-us/download/details.aspx?id=39057
Would you please update it and see if it helps.
Best Regrds,
Susie
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Brief Description of Infrastructure.
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http://www.thomasmaurer.ch/2012/07/hyper-v-replica-the-game-changer/
http://kristiannese.blogspot.in/2012/03/hyper-v-replica-by-example-part-one.html
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Host 1 IP address : 10.25.135.25
Host 2 IP address : 10.25.135.26
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Hyper-V Replica Broker Role : 10.25.135.28
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Host 2 IP Address : 10.103.48.101
Cluster IP address : 10.103.48.27
Hyper-V Replica Broker Role: 10.103.48.28
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English : « xxxx»cannot apply ip settings to the adaptor« {6f71b925-f7d3-4f7a-b987-ca787eca5643} » : non specified error (0x80004005). (ID d’ordinateur virtuel 3B423647-943C-444C-9E2A-E8C24973B643)...
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System
Provider
[ Name]
Microsoft-Windows-Hyper-V-Integration-KvpExchange
[ Guid]
{82D60869-5ADA-4D49-B76A-309B09666584}
EventID
4132
Version
0
Level
2
Task
0
Opcode
0
Keywords
0x8000000000000000
TimeCreated
[ SystemTime]
2013-12-14T15:02:24.884325200Z
EventRecordID
359
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Execution
[ ProcessID]
4192
[ ThreadID]
1368
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Microsoft-Windows-Hyper-V-Integration-Admin
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S-1-5-83-1-994195015-1145869372-3269995166-1136030537
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VmlEventLog
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xxxServer
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3B423647-943C-444C-9E2A-E8C24973B643
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{6f71b925-f7d3-4f7a-b987-ca787eca5643}
ErrorCodeString
%%2147500037
ErrorCode
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