Inplace upgarde of Exchange 2013

Hi Guys,

Is it possible to do inplace upgrade of exchange 2013 from exchaneg 2010 ? I have recieved the following error when I runsetup /prepareschema  /IAcceptExchangeServerLicenseTermsfrom Exchange 2013 with SP1 CD.

Welcome to Microsoft Exchange Server 2013 Service Pack 1 Unattended Setup.

Setup checks failed: Earlier versions of the server roles that are installed were detected.

I am upgrading on my test enviornment where single Exchange server has all the roles in CA, MB & HT in Windows 2008R2 AD.

Any feedback will be appreciated.

Regards

Waydee

Sarwar