Older HP Thin Clients and Server 2012

We are looking to upgraded to Server 2012 R2 (Remote Desktop Services) and our older HP Thin Clients (T5135, T5145) won't connect to Server 2012 with RDP. Does anyone know how I can make these thin clients work with Server 2012. I have tried using Ubuntu on a bootable Flashdrive and it won't load either.
fairtechAsked:
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biaselectronicsCommented:
Sounds like network level authentication (allow less secure connection to RDP)

Have a look here:
http://www.2x.com/disabling-network-level-authentication-for-remote-desktop-services-connections-2/
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fairtechAuthor Commented:
That worked ...thanks biaselectronics
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