-IHM-King welcome to the forum.
probally just needs some tweaking. go here and download tcp optimazer and try that. http://www.testmy.net/forum/t-11975
that router is a pertty good one, not quite as good as the dlink but stll good. There really isnt a problem with v5 or v6, it just has a low amout of internal memory. I actually have a v5 and have not really had a problem with it.
here are a few good ones.
http://www.newegg.com/Product/Product.asp?Item=N82E16833122022
http://www.newegg.com/Product/Product.asp?Item=N82E16833314014
http://www.newegg.com/Product/Product.asp?Item=N82E16833127173
http://www.newegg.com/Product/Product.asp?Item=N82E16833127150