I tested pogo driver but don't use it. I think it's about the same speed as using windows sharing. It's only worth the trouble if you are using it to map a cloudstor share over internet (which I don't do). But there is a serious bug where that it reports out of space error according to other posters that use t that way.
I have CS-WX 2TB, should be the same hardware as yours. You did update the firmware? I am also running a 54 G WEP wireless network, and depending on the computer/tablet I can get 300K/s (low end android tablet), 1MB/s (older laptop), 2.4MB/s (new 1 year old laptop)