Forticlient won't register with FG300D over Extreme switched network

We just installed a FG 300D to an existing network with Extreme switches.  The forticlient will not register with the FG.  It keeps coming back saying "a Fortigate or Forticlient Enterprise Manager Server" cannot be found.  Also it does not detect the FG through the broadcast either.  I can ping the LAN interface and I can get into the GUI for the FG from the computer I am trying to register.  I did try and enable the bootprelay (ip helper for Extreme) and didn't do anything.  Was wondering if anyone has seen this before?