Trial version of Exchange 2013 SP1 will not install trial serverv windows 2012 R2

Pleasehave anyonehave experience withinstallingMSExchange2013SP1inMSWindowsServer 2012R2trial version?Initializationsetupstillhas an errorunsupportedOS:

Error:

An unsupported operating system was detected. Exchange Server 2013 Client Access, Mailbox, and Edge Transport server roles support Windows Server 2008 R2 SP1 or later and Windows Server 2012.

For more information, visit: http://technet.microsoft.com/library(EXCHG.150)/ms.exch.setupreadiness.ValidOSVersion.aspx

I haveinstalledthe trial version: WindowsServer 2012R2DatacenterEvaluation

Thanks for the answer. 

Pospisil