If you look in the netwroking section you’ll find plenty of reasons why and most people say to hardwire the network. If you want to do wireless here is alink to another post in the forum that seems to have very sweet results. http://community.wdc.com/t5/Networking/SOLUTION-TO-STUTTERING/td-p/25768
I am having that same problem but am in the process of folowing the fix above…hope it helps