Hyper-V Only able to run one VM at a time

Hi all,

I have Hyper-V set up with about 3 VM's on Server 2012, but i can only seem to run one VM at a time.

The server has the following:

32GB Ram

1TB HD with 425GB free

When i have one of them started and running, it works just fine.

As soon as i try to run a 2nd VM, i get the following error:

"'PC1' failed to start.

Microsoft Synthetic Mouse (Instance ID 58F75A6D-D949-4320-99E1-A2a2576D581c): Failed to Power on with Error 'The name limit for the local computer network adapter card was exceeded."

I have tried to do the following:

• Disable all networking on each guest VM
• Removed DVD Drive
• Increase MAC range
• Set static MAC
• Changed boot order to put the CD to the bottom
• Disable the integration services from each VM
• Each VM has different netBIOS name
• Each VM has a different VHD and OS

When starting the 2nd VM, it gets to about 10% and then shows the above error message.

Is there anything anyone can suggest?

Thanks