Win 2K8 Svr Std actively refusing connections to open share folders and associated Firebird 1.5.6 DB in the share

I am having issues wit开发者_开发技巧h a new W2K8 Std Svr refusing connections through FB client, unc, or Winders Exploder from other machines on the same single network (192.168.1). I have dropped RSS, disabled IPv6, disabled all "green" and other power consumption management items that affect the NIC but connections are still dropping sporadically. Is there a limit somewhere on maximum simultaneous connections in 2K8 Svr or FireBird 1.5.6 that I am not seeing?

Thanks in advance for your assistance!