Model :

Hardware Version : WR940N v3/WR941ND v6 00000000

Firmware Version : 3.16.9 Build 150312 Rel.59597n

ISP :

Hello i have big annoying problem that i can't fix Im trying 2hours and nothing no succes so this is the problem.

http://imgur.com/a/vlyib (SEE PHOTOS)

I have 2 routers on 1 same ip 192.168.4.254 TL-WR940N / TL-WR941ND and in 2 floor of my house the name of wi-fi is "Home 2" and on first floor "Home -2" and the pasword of wifi is same for both wifi connections BLUE069206416(big letters) i didnt configure it by myself its been configured 1 year ago by one company. And now i want to change password thats the problem because i know how to change

I connect to 192.168.4.254 and the name of the wifi is "Home 2" and i cant find other name "Home -2" of the router on first floor of my house wich has this same ip 192.168.4.254 http://imgur.com/Hb2DoS0 ok so i change password with succes (the new password is only contains numbers 069206416) i reboot the router and i connect to main router "Home 2" everything fine i go in second floor where is wi-fi router "Home -2" to try did the password changed on that router i try to connect it displays wrong password when i try old password than it doesn't show the password is wrong but the router doesn't work until i change "Home 2" to my old password than the 2 routers work again.

I tried everything but only it changes password on the main floor "Home 2" and the other router can't connect until i put back old password on their ip 192.168.4.254

Please help me resolve this annoying and i hope simple funny problem.
Thank you very much.