RemoteApps Server 2012

I'd like to add the RemoteApps (Office 2013) from our 2012 server to our current RD Web Access site (Server 2008 R2).  I've already setup the RemoteApps on the 2012 server and added the 2012 server to the RemoteApps sources on the RD Web Access site (2008 R2) but the applications are not available.  Is this possible? 

Thanks