quaresma07 it would be nice if you elaborated your threads by posting info. some of the devices have issues with security sometimes WEP others WPA you have not posted what security you are extending,...

Kane explain how to upgrade firmware TL-WA830RE Ver.1 & Ver.2 only have first firmware/factory firmware quaresma07 its only able to reload firmware

if possible connect RE to dhcp server

Bolometer when you have solved your issue, like working for 6 weeks flawless, post it, many post same or similar issue, so problem will be solved. one guy name Terryble on other forum, posted that...

Bolometer answer #1 yes is correct you will always see two #2 read post #4 Or enable DHCP to the RE but have to change subnet of RE to avoid ip conflicts with main router and other devices at home...

you dont need the CD for set up. start by posting the set up you need for your TL-WA901ND, Supports multiple operating modes: Access Point, Client, Universal/ WDS Repeater, Wireless Bridge....