Sharepoint 2013 Office Web App

Hello there,

Iam very new to the SharePoint environment in fact Iam learning as iam configuring the server. 

We have a SharePoint 2010 in our test environment and its working fine and also we have installed the office web app on the same box. 

Now i have a bigger challenge i have installed windows 2012 and then i installed SharePoint 2013 i have configured most of the the setting as the SharePoint 2010 but i cant install office web app 2013 on the same box with share point 2013 by the research i found that office web app needs a separate server, unlike the owa 2010 is installed on the same server SharePoint 2010.

And the URL which i configured doesnt work either not sure if it need owa to work. 

can some one please assist me i really need tis working today. 

thanks in advance

Cheers

KB