I could walk you through manually editing the pool info through SSH, but it's not really very user friendly...
It's odd that you can't get the web interface to work, are you sure that you're going to the right IP? Where did you get that IP from? What hands out DHCP addresses on your network?
On a Windows machine, do this:
Start--->Run--->cmd
ping -a 192.168.0.24
See what it comes back with as a hostname. If it's not "miner", it's likely not the g-black, but something else.
You can also do arp -a. Look for 192.168.0.24 in the list, if the MAC doesn't start with B8-27-EB it's not a raspberry pi, and therefore definitely not the g-black.
A computer tech friend of mine gave me a program that pings the entire network and lists everything thats connected to it. That program is finding the pi at that address and as far as I know its the only pi I have on my network. Is it as simple as typing the web address into a browser address bar to get into the thing or am I missing some text? For example, should "192.168.0.24" get me in or is the login similar to FTP over the internet where you have to type something like "[email protected]?"
I have a DSL router handing out the ip address.
Thanks for the help. If I cant figure it out I'll PM you my phone number.