Nobody is following this thread. OP hasn't been on RootzWiki in a year. Thought I'd post anyway . If anybody has suggestions, please let me know. Else, this might prove informational.
Both "Amazon Fire TV Remote App" (published by Amazon Mobile LLC) and Kore (the Kodi remote, published by XBMC Foundation) will break wireless networking if installed...
The device will get a (correctly) assigned IP from the DHCP server (even if static). However, no devices other than the gateway are visible and the internet is inaccessible.
One common permission from both apps is "allow Wi-Fi Multicast reception" and I suspect this is the problem with the ROM.
(Other common permissions like "view Wi-Fi connections", "view network connections" and "full network access" are in use by other apps that are not breaking wireless [like Apps2Fire by Koni], so I assume they are not at fault.)
ps I'd love to know what the chances are of getting KitKat on this ancient little device.