Slow Wired Throughput

[bs23n1b]

   

I need help. I have a LS-W1.0TG/R1-V3 with FW 3.10 and I'm having a speed problem. I have a wired gigabit network that has 2 pc's and the LS hooked up to the router. The pc's transfer files at about 28-35 MB/sec which is exactly what my router has been tested at by smallnetbuilder.com, however, any file transfers to or from the LS max out at 9-12 MB/sec. The LS is showing 1000mbps in the admin page and I have tried different MTU settings with no help. All connections on the router are showing 1000mbps so I can't figure out why the LS is so slow. Any thoughts would be appreciated.