Problem RP-n53 and RT-n66u

[reload_spain]

Hello,

When I configure the repeater RP-n53 to the router everything is OK.
But If I restart the router, the repeteater doesn't reconnect to it. I have to unplug it and plug in again.

Any one with the same problem or solution?

Wireless are WPA-Auto 20 Mhz, channel Auto, Encryption AES.

I tried with I thnk all other configurations but it's the same...

Thank you!!!