workstations are not displayed in Available computers

Hi,  

All Servers are MS Sever 2008 STD

I have a fresh install of SEP v12.1.1.  When I attempt to complete the "install protection client to computers" wizard, I do not have any workstations displayed in Available computers. 

When I select "Search Network" and "Find Computers" SEP is finding all of the workstation either by name or IP address.

Any suggestions?

Thanks, Scott