post wi-fi radio brand, and hows configured, the mode you are using in 701 to connect to the wi-fi radio

the sloped metal roof. could be acting as a passive radio link deflection, or passive repeater read post #4 here...

step 6 talks about inputting security http://www.tp-link.com/en/article/?faqid=250

about noticed that I haven't been asked to put in any details regarding the security (WEP) of connecting to the current wireless network, but I'm assuming this is all handled by the central router....

no way you can cahnge channel on a TL-WA730RE do as told on post #2 reset the device and reconfigure i i will after reset, reload firmware,, and very important this RE Ver2 has issues repeating WEP...

for 7510 this one http://www.tp-link.us/products/details/?categoryid=2474&model=TL-ANT5830B on AP1 enabling external antenna, dont buy it unless needed. pointing two CPEs its very easy cause of the...