I'm running my DT currently (and have for a number of months) with the Apex Classic + WNCE2001 combo with no issues whatsoever and my Wifi router is 3 floors away. I'd suspect some other issue at play, have you perhaps tried giving it a static IP? Sometimes, depending on the router, DHCP can cause transient issues like frequent disconnects.
I'll also add that I've heard good things about the power line adapters as an alternative to areas with weak signals; however, I haven't been able to try it personally as I have a large home automation deployment which also uses the same power lines to communicate
I'll also add that I've heard good things about the power line adapters as an alternative to areas with weak signals; however, I haven't been able to try it personally as I have a large home automation deployment which also uses the same power lines to communicate