Make sure your PC is on the same subnet as the cubes 192.168.1.x
You need to set each cube to have a separate IP address otherwise they will all conflict 192.168.1.250 - 192.168.1.251 - 192.... etc, do not use 192.168.1.255 though!(it's a special "broadcast address" used in networking so stay away from it.)
I'm going to assume these run nearly identical firmware to the ASICminer Blade Erupters I have and will need to use a Stratum Proxy on a PC. Here are the settings I'm using.
Current Server: 192.168.1.19:8332
Chip: OOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOO
IP 192.168.1.20
Mask 255.255.255.0
Gateway 192.168.1.1
WEB Port 8000
Primary DNS 192.168.1.1
Secondary DNS 8.8.8.8
Ports 8332,8332
Server addresses 192.168.1.19,192.168.1.19
user:pass username:password,username:password
In my setup you can see my PC has a static IP set to 192.168.1.19
For the stratum proxy I'm using Slush's:
http://mining.bitcoin.cz/mining-proxy-howtoBy default you need to fill in the "username:password" fields in the ASICminer config page and they need to correspond to an existing account, otherwise no work will be handed over.
Alternatively if you want to use a server like say Eligius you can ignore the user:pass fields and create a *.txt file in the same folder as mining_proxy.exe.
paste this into that file:
mining_proxy -o stratum.mining.eligius.st -p 3334 -cu WALLET_ADDRESS_HERE -cp x
fill in the wallet address part accordingly
save the file, then rename it to a *.bat file, make sure you have the "show file extensions" option turned on in windows so you aren't naming it *.bat.txt by mistake. If it's opening in notepad when you try to run it you're doing it incorrectly.
Hope this helps, I had a hell of a time getting my BE Blades going the first time.
Also something you are saying is inconsistant. You say you're changing the IP of the miners, yet you can't access the config page, where are you changing the IP then? Also the miners will not show up for your router(inside it's management pages) because they don't use DHCP to grab a new IP address.
I might be able to try helping you through team viewer.