DGND3700v2 Slow NAS and WDTV Live performance

Hi all,

just got a DGND3700v2.. but have a bit of a problem, when I have my WDTV Live and my Readynas NV+ v2 attached directly into the router I get slow video and performance in general while using the WDTV, If I have either the Readynas or WD TV attached to a gigabit switch.. everything works fine

do you think I have a faulty router?

Thanks in Advance

Andy