Only 240 inches away and it doesn't work?
Is it possible to move the wireless router in your house to another area that might be closer to her, it's interesting that the phone / comp see the wifi and the ipad doesn't, I usually get a better signal on my iPad than any other device.
I know someone that went with one of these and were happy with it, but I have personally never used one.
http://www.bestbuy.com/site/netgear-...&skuId=5970343